...My guess is their hatred of society stems from a wish to have their behavior normalized.
Self hatred, everything else follows
...My guess is that even if their behavior is “normalized”, they’d still be unhappy.
Especially if they still see other people being happy and getting on with their own lives.
My guess is that you underestimate their mental illness.
Their “behavior” is merely one expression of their loathing for everyone else, in fact, all of human society. If they couldn’t do this, they’d be skinning the neighbor’s cat.
It is the nature of this kind of illness that the expression escalates. After all, it is not the behavior, itself, that gratifies the ill person, but its effect on society.
These people need to be locked up. Treated possibly, but locked up if their antisocial behavior cannot be controlled.