Every church says they are the one true church
Yes. Some wag once postulated that because all churches seem to condemn non-adherents to their particular faith to Hell, we're all going to Hell. I think that's not the case, but all do claim to be the one true faith.
I'll bet there may actually be about 6 Billion (and counting) "true faiths." I'm like Laz, in a way...I believe them all. Except the ones who think it's OK to crash jet airliners into skyscraper full of innocent people. I don't believe them. They are going to Hell, and 72 virgins that look like Helen Thomas.