I think a lot of these igrnorant trolls would be incredibly shocked to learn that topics like cultural appropriation, media representation, societal privilege, and most other things that fall under the real of social justice actually come from academia, not Tumblr.
These conversations started at universities and colleges, not on the internet. The reductionist version of these ideas that people are being fed online are quite far removed from their academic originators.
Not shockingly, a lot of the pseudo-intellectualism that has been spawned from these well supported sociological theories comes from self-proclaimed “allies” of various marginalized communities, and not community members, themselves. Some such individuals have become so entangled in their ally-ship that they have created false ethnic and racial identities, and lied about academic credentials in order to stand on a higher soapbox.
If trolls would spend half as much time simply researching the academic side of social justice as they do mocking the pseudo-intellectuals who shout, “check your privilege!” they would actually do far more to dismantle the thing they hate. But, that’s a naively optimistic sentiment considering most trolls are, too, egotistical pseudo-intellectuals.