Only a few years ago they wanted to segregate inmates by race, but were overruled. Judges and politicians don't have to deal with realities of trying to manage inmates. I don't like the tactic of 23 hour a day lockdowns as punishment, but do think inmates being isolated from each other as much a possible is tactic they need to install. I saw a documentary on Soviet prison. They don't let any inmates interact, they said it leads to trouble. They are correct.

Inmates should get to associate with each other in groups only as a reward for behaving. Otherwise, no contact with each other till they learn to act human.