This goes for guns as well. Instead of focusing on the victims and putting the violent away from society, we rehab the criminal so that he can go out and do it again.
Then we blame it on the guns, not the individual.
There is an easy answer. Prosecute the violent criminal and keep him locked up.
Research psychotic drugs used for depression, schizophrenia and others and see if there is an association between these drugs and massive violent tendencies.
Allow for the institutionalization of the violent mentally ill.
Eliminate all handouts and incentivize personal responsibility