EP : This seems to be a bit all over the place. Is the idea to simply be nice? If so, that's not a bad idea, usually. Is the idea to NOT challenge people or debate things if it makes someone uncormfortable? If so, that's not going to happen.
Who said anything about not challenging beliefs? It's what a forum is about. It isn't even about being nice. I thought I was pretty clear about that, but obviously not. It'll give it one last shot. It's good to challenge beliefs, point out flaws in logic, expose circular reasoning, expose mis quotes and identify falsehoods. It is not helpful to use scorn or ridicule, be condescending, patronizing or rude. It is not necessary to pretend, be fake nice or not state truths.
If people can't see the difference between challenging beliefs and heaping scorn and ridicule, then there is nothing more to talk about.