Do you have to deal with them? If not, that’s one possible approach: withdraw. This applies to real life as well as the Internet.
Great advice.
I know that several of my colleagues are Christians, and they may know that I’m an atheist, but it basically doesn’t come up in conversation. I have no mission to convert any of them, and I’d only discuss it at all if someone else started the discussion.
Great advice.
Even better advice.