When I argue that atheists ought to aspire to be better people, I always get this weird counter-argument, along these lines:
Ayn Rand was an atheist, and she pretty much opposed every single thing you lousy Social Justice Warriors stand for. Are you saying she wasn’t an atheist? No. I’m saying she was a rather crappy person, and that maybe atheists ought to aim a little higher, and not insist on reducing every atheist to the same feeble common denominator. That the general term encompasses some awful people does not mean we’ve been given a pass to be awful ourselves. If the atheist movement were synonymous with the objectivist movement, I wouldn’t be proud to call myself one.
Here’s another perspective:
I have another response to those social justice haters: if you’re so smart and gosh-darned clever, how come you’re not using your powers to help other people and promote equality and diversity and justice for all? Superman wasn’t a Libertarian, but Lex Luthor shows all the signs.