"please dont eat the magic poison pudding, it's bad for you and also magically kills us when you eat it."

"well that just makes me want to eat it more then, haha!"

"no dude seriously like it's really really bad for us and is also bad for you in these specific ways. look man there's all this good food right here, and there's even other pudding that doesn't kill us when you eat it."

"well i like the poison pudding so i'm going to keep eating it even thought it's bad for me and terrible for you."

which of these people is being "purist" and/or "dogmatic"?

i don't mean to begrudge people for liking their junk food (and i also have junk i enjoy that is so bad my wife won't tolerate it). but hp is a special case and i'll never not go hard about it, because rowling's influence is at such scale that this is very quickly becoming a matter of life and death for trans people.