I think you'll find most of these people are parents. Hence why the discussion is going the way it is.

Medical vs Choice.

The exact equivalence of claiming the kid is allergic to milk when they're not, is the same as the parents who claim their kids wers celiac - the kids weren't but it made the parents feel entitled to special competition points amongst their groups. Regardless of their kids well being.

The parents you don't like, just are not going to agree with the multitude of incredibly rude, vocal vegans and the like here who think forcing their life choices on others is acceptable. Especially children.

Also, oreos are vegan so all this fuss isn't even abou the cookies. Just life choices.