>I know the guy didn't choose to be the way he was and I'm sure what was going through his mind was hell. But that doesn't mean that the rest of us should just live with the consequences of harmful actions.
ok, but aside from a time-machine and time-cops, what do we do?
We 'compartmentalize' the ill out of our lives -- they don't just disappear, they roam the streets and poorly interact with societies ..
-OR-
certain professionals sacrifice aspects of their lives in order to facilitate treatment and professional isolation for such individuals in an effort to keep them off the street and out of interactions with regular society.
which one results in less violent crimes towards regular citizens?
It should be obvious to anyone with their eyes open that someone has to interact with these people to provide rehabilitation and growing potential for people in need.