Hello! The billions of people professing faith in Jesus Christ believe that, too.
By definition, a Christian is someone who believe that the Mosaic era ended and that Jesus Christ came into the world, established his church, and through Jesus all must be saved.
I don’t believe Muslims, Buddhists, nor Jews (I.e those who follow Judaism) will go to heaven. I believe Christ is the way -
Act 4:8 Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel,
Act 4:9 If we this day be examined of the good deed done to the impotent man, by what means he is made whole;
Act 4:10 Be it known unto you all, and to all the people of Israel, that by the name of Jesus Christ of Nazareth, whom ye crucified, whom God raised from the dead, [even] by him doth this man stand here before you whole.
Act 4:11 This is the stone which was set at nought of you builders, which is become the head of the corner.
Act 4:12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.
How DARE you accurately quote Scripture! ;-)