Christians believe that Jesus is the way and their Only Savior based on the following verse found in John 14:6 "Jesus said to him, "I am "the way, and "the truth, and "the life; no one comes to the Father but through Me."
This contradicts where it says in: ISAIAH 43:9-11 " Let all the nations be gathered together, and let the people be assembled: who among them can declare this, and show us former things? let them bring forth their witnesses, that they may be justified: or let them hear, and say, It is truth. . Ye are my witnesses, saith the LORD, and my servant whom I have chosen: that ye may know and believe me, and understand that I am he: before me there was no God formed, neither shall there be after me. . I, even I, am the LORD; and beside me there is no Savior."
In verse 11, God very clearly and categorically stated that He is the Only Savior and none else.