Some of what you mentioned here, if not most, seems specific to the USA, from my western European point of view. Do you know of any explanation for that?
This is not an actual prevailing attitude in the US.
I won't even say that nobody thinks that way, I just want proof that this is the prevailing mindset.
It is undeniably normative.
People laugh at prison rape because those guys are bad so rape is okay.
As very few prisoners actually vote, this horrid blight on France's human rights track record isn't going to change in a hurry.