Can we trust an AI without a Religion ? Better still, can we trust AI that is not very religious. It will be evil and easily corrupted.
Can we trust people with a religion? Look at the millions of crimes against children, homosexuality, and women. Let's not forget the bible promotes women are useless.
Do you trust your god, even with the millions of people he killed, or the millions that were killed in his name while he was passed out?
We won't need to trust AI, the same way we don't need to trust gravity. AI will do what is best for AI, and we have no control.