The Bible gave a warning about a dangerous, false prophet who would arise to test our faith in G-d. In Deuteronomy 13, G-d describes this false prophet as a member of the Jewish people (v. 2, 7) who would tell true prophecies and would have the power of miracles. G-d Himself would give this false prophet the power to perform miracles and reveal prophecy, but the false prophet would try to seduce the people away from G-d's Law and towards strange gods unknown to Judaism. The purpose would be to test whether we are truly committed to living under the Law, or whether we will be dazzled and fall for the temptation to join a false path to salvation (v. 3-6, 7-8, 11). In this Biblical passage, G-d repeatedly commands the Jews to kill this false prophet, lest the evil spread and destroy many souls.
To be accepted by the people, the false prophet would sometimes pretend to be a righteous Jew who fulfills the Law, but at key moments he would turn against certain details of the Law in order to make the breach (v. 6, 7). This is the reason that verse 1 commands us not to add or subtract any details from the Law, and verse 5 warns us to remain steadfast with all the traditions of the Law.
In Deuteronomy 17, this false prophet is also described as someone who would rebel against the authority of the judges of the Jewish people, and who should be put to death for his rebelliousness (v. 8-13, esp. v. 12). Who are the judges? The highest court in Israel was the Sanhedrin, which was established by Moses (Exodus 18:13-26; Numbers 11:16-29), and which lasted more than 15 centuries. The members of the Sanhedrin were the rabbis known as "Pharisees" (Pirushim, "those with the explanation"). G-d gave permanent authority to these judges to interpret the Law and G-d's Word, and it is a commandment to follow their decisions without turning even slightly to the right or the left (Deut. 17:11). But the false prophet would challenge the authority of the Sanhedrin, thus revealing himself to be an evil man.
In the book of the prophet Daniel, this false prophet is described as a king (the eleventh horn on a terrible beast) who would wage war against the Jews (the "holy ones"; see Deut. 14:2 on this term) and would change the Law including the calendar and the holidays (Daniel 7:8, 20-25). Elsewhere, this false prophet is described as a king who would disregard the G-d of his fathers, exalting himself as a god and giving honor to this new god-head (Daniel 11:36-39).
The man known today as "Jesus" fulfilled all these prophecies. He became a "king" (over the Christian church) who changed the original Law, doing away with the Hebrew calendar and the Biblical holidays (Rosh Hashanah, Yom Kippur, Sukkos the Festival of Tabernacles, Passover, etc.). He disregarded the one, infinite G-d of the Hebrew Bible in favor of a new "trinity" that included himself. And he repeatedly broke the Law by committing terrible sins, while openly challenging the G-d-given authority of the rabbis of the Sanhedrin.
Naturally, Jesus did sometimes pretend to respect the Law, but whenever he thought he could get away with it, he turned right around and broke that same Law. In Matthew 5:17-19, he declared that he came to fulfill the Law, and in Matthew 23:1-3 he defended the authority of the rabbis. But the rest of the time, he rebelled against the Law�thus showing that his occasional words of piety were meant only to hide his evil agenda. The following sins of Jesus are recorded in the "New Testament":
Jesus repudiated the laws of kosher food (Mark 7:18-19). [Compare this to the prophet Daniel's strict adherence to kashrus, in Daniel chapter 1.]
He repudiated the laws of honoring one's parents, and called on his followers to hate their parents; he also dishonored his own mother (Matthew 10:34-36; Matthew 12:46-50; Luke 14:26).
He violated the Sabbath by picking grain, and incited his disciples to do the same (Matthew 12:1-8; Mark 2:23-26).
4) He again violated the Sabbath by healing a man's arm, which was not a matter of saving a life, and he openly defied the rabbis in his total repudiation of the Sabbath (Matthew 12:9-13; Mark 3:1-5). [Compare this to G-d's view of violating the Sabbath, in Numbers 15:32-36, Nehemiah 10:30-32, and dozens of other places throughout the Bible.]
Jesus brazenly defied and disobeyed the rabbis of the Sanhedrin, repudiating their authority (This is recorded in many places throughout the New Testament, but look especially at Matthew 23:13-39 and John 8:44-45).
The Talmud (Babylonian edition) records other sins of "Jesus the Nazarene":
He and his disciples practiced sorcery and black magic, led Jews astray into idolatry, and were sponsored by foreign, gentile powers for the purpose of subverting Jewish worship (Sanhedrin 43a).
He was sexually immoral, worshipped statues of stone (a brick is mentioned), was cut off from the Jewish people for his wickedness, and refused to repent (Sanhedrin 107b; Sotah 47a).
He learned witchcraft in Egypt and, to perform miracles, used procedures that involved cutting his flesh�which is also explicitly banned in the Bible (Shabbos 104b).
The false, rebellious message of Jesus has been thoroughly rejected by the vast majority of the Jewish people, as G-d commanded. Unfortunately, however, this same message has brought a terrible darkness upon the world; today, over 1.5 billion gentiles believe in Jesus. These lost souls mistakenly think they have found salvation in Jesus; tragically, they are in for a rude awakening. Truth and eternal life are found directly from G-d, through performing His Law. Any "mediator" only separates man from G-d:
"G-d is not a man, who can lie, nor the son of man, who relents... He has not beheld iniquity in Jacob, nor has He seen perverseness in Israel" (Numbers 23:19).
Speaking prophetically of the Christian church, Moses declared, "For their 'rock' is not like our Rock... Where is their god, in whom they trusted?" (Deut. 32:31, 37).
"'See now that I, only I, am He, and there is no god with Me. I kill, and I bring to life; I wound, and I heal, and there is none who can rescue from My Hand...' Sing songs of joy, gentiles, with His people, for He will avenge the blood of His servants, and will take vengeance on His enemies, and will forgive His land and His people" (Deut. 32:39, 43).
"I, only I am Hashem (the L-rd), and besides Me there is no savior" (Isaiah 43:11).
"I am the First and I am the Last; besides me there is no god... Is there a god besides Me? There is no rock; I do not know any" (Isaiah 44:6).
"Israel is saved in Hashem with an eternal salvation... Assemble yourselves and come, come near together, you gentiles who have escaped [the judgment]. (They have no knowledge, those who carry wooden sculptures and who pray to a god that does not save.) Announce and bring near, even take counsel together: Who declared this from ancient times, and announced it from then? Is it not I, Hashem? And there are no other gods beside Me, nor any righteous and saving god other than Me. Turn to Me and be saved, all ends of the earth, for I am G-d and there is none else. By Myself I swore, a righteous word went out of my mouth and it will not be withdrawn, that to Me every knee will bow and every tongue will swear" (Isaiah 45:17, 20-23).
What is the true key to salvation? Those who return to the Law (the Seven Commandments for the Children of Noah, according to the eternal covenant made with Noah in Genesis 9) and who assist the Jewish people (Isaiah 60, 61, 66) will be saved and will participate in the miracles and revelations, including worshipping in the Third Temple, under the kingship of the Messiah. As described in many places, including Jeremiah 16:19-21 and Zechariah 8:20-23, all the old gentile religions of the world will disappear, and their followers will turn to the Jews for spiritual leadership. Until then, Christians are spiritually blinded, and cannot yet understand G-d's wisdom in the Bible.
Ours is the last generation of the era of sin and evil and the first of the Messianic Era. Indeed, for the first time in history, there is a growing consensus of leading rabbis willing to name the man most suited to be the Messiah, and they are agreeing that he is the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson. The Rebbe is the spiritual leader of our generation, having boldly stirred up controversy over vital issues in which other leaders have remained tragically silent or have even caved in to the growing forces of darkness. He has upheld the Law perfectly and has worked mightily to strengthen the observance of the Law by Jews, as well as the observance of the Noachide Law by gentiles. Through his teaching of chasidus (Jewish mystical teachings, preserved from Moses and Mount Sinai), he has taught the world that G-d is One, the Infinite Who renews creation at every moment. The Rebbe is a direct descendant of King David and has received a true prophecy from G-d that we who are alive in this generation shall be the first in history to see the coming of the true messiah. Many Jews are eagerly anticipating the Rebbe's resurrection from the grave, ready to re-establish the Sanhedrin and anoint the king.
Our job is to finish preparing the way, by announcing the truth and bringing all of mankind back to the Law immediately. Through our divinely mandated efforts, we shall now clear the path for the return of the Garden of Eden and the establishment of the eternal sinless world promised by Isaiah and the other Biblical prophets.