something that's occurring to me this morning:
it's not enough that the potter fans want to have their fun; it's not enough that they're willing to ignore the hateful baggage and fund hate against their communities - I suspect there's another aspect.
They're upset we won't shut up and come along. They genuinely resent that people have a line, have found a limit to what they'll accept, because apparently they don't have that line, that limit of what's OK, and they resent people reminding them that they really should.