No matter how unfair the group A is towards them, the group B is not socially allowed to defend on the same level. ... Guess which one of these two groups has a higher status.

I don't think this dynamic is as closely linked to status as you seem to be implying. We could, for example, be looking at union members and executives in the lead-up to a strike, or the adherents of an extremist sect next to the more liberal religion it sprang from. Yet in both cases I don't think many of us would consider the former to hold higher status than the latter.

Similar but less extreme relationships also tend to hold in the aftermath of successful civil rights movements.