I think that to a surprising extent, liberals and conservatives live in different versions of America. I try to keep my news exposure to a minimum, but I do make a point of visiting the major outlets for both ideologies. You can really see how reality itself is curated. I don't even think it's really curated ideologically, either, my feeling is that media outlets know their audience and make sure they are reinforcing the relationship instead of challenging it.
Will Shetterly is often credited with inventing the term "Social Justice Warrior". He called it identitarianism, made a decent case that it first appeared in Unitarian-Universalist circles in the 90s, and has been criticizing it ten years before anyone else. He's also a communist and a Civil Rights veteran.
As much as actual communists fight among themselves, it'd be a miracle if the tendency of "identitatian deference" hadn't been identified and criticized by someone long before the right noticed it.