I'd'a thought it'd be the *Anti*-religionists; the impression one got from the meeja blitherings about it (at this remove) was that all in all, it was much more a force propagandazing FOR jeezmoidery than possibly denigrating the same by being dogmatically incorrect.
More a case of the pious -- *being* Mel and his merry moviemakers -- uppsetting the rest of us, than anybody non-pious upsetting the pious, I thought.
Seems I underestimated the pious' capacity for being offended.
Live and learn.