I mostly don't want to talk about atheism on fb because if people I like for other reasons are theists I'd rather give them the benefit of the doubt. Maybe they're a sinnersburninhell but maybe they're a smoothjacob or a chadwooters, thinking people whose life-paths hooked them into a religion. People are able to overcome much worse than religion.
When people first get out of a religion we have all these unfinished conversations with people who had been important to us in one way or another. Justifying atheism or even making the case for its superiority is more about tying up that unfinished business than it is about saving the world from ignorance. If you need to get something off your chest, go ahead. But once the importance of religion shrinks to a reasonable size it will be possible to appreciate people for many things which will be more important to you than their religion.
When people first get out of a religion we have all these unfinished conversations with people who had been important to us in one way or another. Justifying atheism or even making the case for its superiority is more about tying up that unfinished business than it is about saving the world from ignorance. If you need to get something off your chest, go ahead. But once the importance of religion shrinks to a reasonable size it will be possible to appreciate people for many things which will be more important to you than their religion.