Out of curiousity, I just read the 'chicken' discussion, and didn't really see very many comments I would call 'derisive' or 'condescending'. Perhaps some of the comments might be described as 'irreverent'. And there, I think, is where conflict arises often between the religious and the agnnostic/atheist individuals. Common politeness requires one to be respectful towards others, and that includes their beliefs, of course. But I don't think unbelievers should be expected to hold others' beliefs 'in reverence', and that may mean questioning practices we see as foolish, harmful or intolerant.

Deities in their multitudes have seldom been good for women: I think I have reason to question their followers. Note that even in the situation that spawned this discussion, it is the women of the households who will be most inconvenienced.