Going to be honest: They read the Bible or at least parts of it. But most do not truly process what they read. Not to mention that pretty much all of them are reading biased translations of translations of translations where a lot of nuance and caveats and original meanings are lost, if not completely mutated into something that's antithetical to the original meaning.
But anyway, gays are bad but shrimp is okay as are my tattoos and the 70% cotton, 20% rayon, 10% polyester socks I'm wearing. Time to stone a whore.