I highly doubt the hardcore evangelists actually pray let alone believe in any of the tenants of Christianity. There are people who use religion as a crutch to put down other people and it's kind of sick and disgusting. "Going to church" is more of a source of gossip and communion (communion as in "discussing football with fat sweaty guys and women talking about their nails and neighbors") than it is actual WORSHIP.
This is one of the many reasons I stopped believing in the mystic avenger in the sky. I used to be a Christian, but stopped following it for several reasons.
1. I actually read the bible and found many of the passages to be absolutely abhorrent.
2. I used to read a lot of history books and the stuff that religion was used to justify is really repugnant. Murder, genocide, spousal abuse, child abuse, slavery, racism, etc.
3. Other religions had much cooler gods. Zeus, Ares, Hades, Odin, Thor, Loki, Ra, Anubis, Nu Wa, Shiva, Ganesh, Pele, Kane Milohai, etc. (congrats if you can figure out what cultures those all came from without looking them up).