Partly because Christianity was not started by white people. The staple of the history of Christianity was Africa and the middle east and that there are plenty of Christians in Africa and other regions of the world that have never been to America. White people are not the message carriers of Christianity. I've been to Africa and seen the deep Christian roots, dating back to the Early Church. As far as Christ being the only way to salvation, every statement he made was an all or nothing statement. If he's not the only way, then his whole ministry was a hoax and everything that he said was a lie because his statements and actions were predicated on that fact.

Apocalypse

"When purpose is not known, abuse is inevitable . . ."