I don't think it should be Community Wiki.
First off, the question as asked right now has reasonable answer(s). It is asked as a "belief", and that means it's the first of the causes (give or take).
Second, Community Wiki isn't intended as a fix for a "too broad" question. That's what's being suggested here: the question has multiple correct answers, right? That's not the point of CW. In fact, as Grace notes in the "Future" post linked above,
questions rarely, if ever, need community wiki.
Perhaps a specific answer might justify it - but I don't think that applies here, either. This is neither such a difficult or complex question, nor is it a question with a 'list' element that is expected to be collaborative. It might have multiple approaches based on the root cause, but either they're similar enough that answers can include the main root causes, or the causes are sufficintly different that separate questions are appropriate.
I think that, for the specific question at hand, the differences between the root causes - religious belief, anxiety, physical disability - are not going to factor significantly in the answers. The only significant difference is whether the school must make an accommodation; that's a minor element of the answer, in my opinion. The other things - how to get the school to cooperate, how to deal with kids teasing, etc. - all are ultimately the same, or similar enough, in my opinion.