He should have the right to self-identify as a witch if he wants. You have no right to take that away from him.
Actually, It's called not knowing what the fuck you're talking about
The logical thing to do would be to educate yourself.
P.S. trans people's brains objectively show non expected neural activation. And this is just one of the many ways for people to understand trans. It's a real thing and you need to EDUCATE YOURSELF instead of acting like bill oreilly. Ignorant asshole.