It's rarely talked about, because religion is not considered an immediate social plague. Inequalities pose more of an issue first and foremost. But a lot of SJWs are either atheist or agnostic.
Yeah, this is basically what I thought. It definitely seems like a bizarre attack to level at "SJWs" (not to say that his other attacks aren't wrong etc - but they don't completely come out of left field).
Anyway, I think there's a fundamental difference between people on tumblr complaining about men or white people and actual racists and misogynists, in that when people on tumblr say those things its generally an expression of frustration at oppression and disadvantage, which doesn't cause men or white people
actual problems in the real world, while power structures continue to support racist and sexist attitudes, and racism and misogyny translate into real violence against women, black people, gay people etc. in the real world.
(That's not to say that I don't have some problems with "SJW" politics. I think traininthedistance said it well).