It most certainly does not originate from the black community, but leftist liberal white academics. Blacks have certainly adopted the cause but they are not the ones stirring most of the ridiculousness we are seeing.
For example, "intersectionality" was coined by this black academic:
https://en.m.wikipedia.org/wiki/Kimberl%C3%A9_Williams_Crens...
There are many more examples of black activists and scholars who have pioneered this way of seeing the world. Ascribing that work to white scholars denies the people actually doing the work agency, and to reiterate, is racist.