Alls I do when running into a religious person is point out the fact that the bible was not written by god. they try to skirt around the idea with yet more magical bullshit, by saying "it was divinely inspired, men just wrote it" thats when I politely tell them the conversation is over and leave. You will never be able to win a conversation with somebody that has magical thinking, because everytime you bring up facts, they have yet more magical formulas for their positions.
The only way I think to combat this horrible shit is too end there tax exempt status. lets use the government against them,
Why they have tax exempt status is beyond insane since almost all fucking churches are run like any goddamn corporation