Once upon a time, I asked a question, pretty much a reference-request question, about an obscure, mostly Jewish proposition, except I felt like the proposition was the kind of thing that would "naturally" occur to lots of other people, so maybe there would be in Leibniz (or wherever) an example of such thinking. The question was of course closed as off-topic [EDIT: I double-checked, the closure is given as because the post is not focused, not because it's off-topic], but since then I've watched questions about philosophical analysis of the Trinity go through, or questions about specific New Testament passages, etc. and I'm not thinking to accuse this SE of antisemitism, say, I don't think that was the problem (not consciously/non-systemically,X that is), it was probably more how I wrote my post, but still...
... still, anyway, we can't have Christian supremacism here. It's a blatantly morally false position, and it's off-putting to non-Christians to deal with propaganda like, "Why is Christianity so much more impressive than every other religion?" and such-like.
Incidentally, we had a well-educated user contributing for a while here, by the name of Frank, but AFAIK he left because there were so many theism-related posts here, and it wasn't that he was against theism in and of itself, but his experience online in general was that theistic questions tend to degenerate into undecorous debates. To be sure, in philosophy, we will quibble about the most obscure/random little things, so if Frank wanted to avoid Sayre's law, he would've had to abandon this SE regardless, but I do want to bring up his sentiment to showcase how there can be a reason to be extra-careful about religiously-based posts (either questions or answers) that isn't an anti-religious reason.
XIn terms of systemic racism, on the other hand, I wouldn't be surprised if the SE network as a whole has to grapple with that. The requirement that we post in English might be construed along those lines, although I myself am not sure about that (if it's just a "lingua franca" issue).