There is of course a strong identity component here. Trans people who want to feel a certain way about people portraying symbols from the series, or engaging in intra-community discourse, have feelings that are beyond my purview to criticize. But there's a growing contingent of straight, white, cis folks who have started to take it upon themselves to be competitively cruel to HP fans to demonstrate their allyship and it's really not a good look. Cruelty is never good allyship.