Sebastian is a creepy, creepy, evil evil... person..., and so far the most legitimately villainous villain the show has had--but he's also the Male Santana, which means there is probably some kind of very upsetting backstory that has led to him becoming the most offensive character, like, ever. (even more offensive than Santana used to be or has been in the past.) And, of course, he goes to Dalton, so presumably he's had something awful happen for him to end up there. (Alternatively, the reason he's screwed up the Warblers so bad is because he's just there because he has a lot of money, and is the only one there who hasn't had to be bullied to end up there.)

Also, the way you've put that--Sebastian being, among other things, homophobic, when he's gay himself--makes me momentarily stop disliking and being very wigged out by him, and just makes me sad for him. ;___;

I like this thought about Burt and Blaine <3