Are prison systems a catalyst for poor race relations? (Details)

I hear that much of the driving factor in Latino vs African American racism, has it’s origin in West Coast (USA) prisons. There, they hate each other, and when they are released, they teach their peers to hate the other race.

Then there’s a much older, better known white supremacy thing. Black inmates being mistreated by white jailers etc…

In many prisons, inmates are separated by race. No doubt that the segregation is done to prevent violence, but it is still segregation.

With such a large amount of citizens spending time in US prisons, what type of effect do these circumstances have on the population’s race relations?