I need a quote from or about the Christmas Truce of 1914. I asked on History SE and have so far not gotten any reasonable bites. Is it possible to reframe this to post on ELU? (I would of course delete the question over there first.) Is asking for quotations on topic on ELU? (I would have thought yes, since asking for idioms is allowed....) Any specific reframing advice?
Sorry, I don't think there is any way to make this kind of question a good fit for this site.
For a good idiom request, the criteria are generally only partially subjective, such as "the idiom should convey this meaning" or "the idiom should be formal (or informal)". There can be disagreement about things like this, but in general, people should be able to come to an agreement about whether or not a suggested idiom meets criteria like these.
But your question seems to have very subjective criteria: you want a quote that is emblematic or inspiring. Opinions on this are likely to vary a lot between different people.
In addition, the most important objective criterion seems to be establishing the historical accuracy of a specific quote. I don't think questions about this are on-topic here, although maybe there are some that I just have never noticed. A question like "was this expression used in this time period" seems to me to fall within the scope of this site, but asking things like "did this particular person say this particular quote" doesn't.