Why do many Christians (e.g. Josh McDowell) claim that ONLY Christianity teaches the primacy of FAITH as the..?

Jesus was very specific in saying that in order to go to heaven we need to believe in Him and Him only. There is NO OTHER PATH! He said I am the Way the Truth and the Light NO ONE comes to the Father except through Me. These are the words of Christ. If you truly believe that He is your messiah and the ONLY begotten Son of God, then you should accept His words at face value- NO ONE goes to the Father except THROUGH Me. This is pivotal. We must believe in Christ to see God. Period.