@People-watching a kid go batshit crazy for 6 hours, and then spending the next 6 hours holding them while they scream in agony and have bloody diarrhea after being fed something with wheat or dairy in it would me be heavily opposed to whatever food product caused it, too.

Saying no one would have food allergies, like you, if they all followed the same upbringing as you is facetious and not the way to make your point.