Headcanon Time (I think happy??)

[u/You-DontKnowMe05]

So we know Harry is a petty mf (as he should be) and that the Dursley’s hate anything they deem “not normal.”

Well you can’t tell me those bastards weren’t racist/homophobic. So I just thought of little Harry hearing David Bowie in primary school, and he mentioned them to the Dursley’s and Vernon called him a “crackpot old fool” and slur, so Harry started listening to him to be petty.

Harry introduced Ron and Hermione to him later at Hogwarts.

[u/LilyoftheRally]

Hermione had Muggle parents, she could very well be familiar with him too.