The concept of universal human rights is an abstraction. So too is “social justice”, which can mean whatever the person using it wants it to mean.
Ponder how odd it is that we were able to build so much on one iteration of abstract thinking; and how that same style of thinking, with different content, is working so well to destroy everything good it touches.
Self evidently, the common theme is emotional detachment, and the differences are in the spirit of active and self reflective honesty, genuine good will, and attention to logical rigor, none of which matter in the slightest to most current academics.