8ball
Testicle Menace
you can't argue with people who think they have god on their side. the wrath of the righteous is the only language they understand.
No, you can.
You never know at the time, unless you get to know them, but you can plant seeds and sometimes they'll think later about what you said.
In my experience people who are religious are no less rational than non-religious people. Sometimes they're more aware of when they're letting go of rationality, so can be more amenable to reason than someone who thinks all their opinions have come from their reasoning rather than their experiences and emotional responses to them.