>>513293290
They're the flat earthers of medical science. You could literally walk them through several iterations of clinical studies and research, and they won't let that particular bone go.

It's a part of their identity, now. That's why the whole pureblood shit spread like wildfire. You're no longer discussing disagreements in public health, you're now attacking who they are as a person.
It's weird but very common with faith-based "reasoning."