see linked post. I believe this would count as one of the examples given in the federation policy https://lemm.ee/post/401063 :
An instance which is knowingly spreading CSAM into the federated network
I can’t say I do understand it as a social strategy, I would hazard a guess it’s something like “if we make this group enemy #1, we can get lots of people rallied behind us and they won’t pay attention to the horrible things we do”?
I think it’s a bit ancillary but yes, one of the benefits for the racist is that by defining others as being part of the outgroup, they place themselves in the ingroup and thereby have people they can rely on with a common cause they both oppose (the flourishing of the minority group).
But probably the most concrete reason is economic (I was using “social” in its broadest sense), specifically that the brutal marginalization of minorities pushes them into the position of an underclass, whose labor value is the most exploited, meaning where ever the poor racist ends up in life, it is less likely to be there at that bottom rung, while the richer racists get cheap labor.
