Some human beings are permanently ruined. I don't intend to suggest that the power of love and friendship can save everyone. But to blame the individual is to excuse the primary blame holder: the ones who put the guns in their hands and taught them who to shoot at.

Also, yeah, if they can't apologize to their victims, they are still ruined. Their humanity has been destroyed by an outside factor. We can't accept them in that state. The boldest among us can try that repair process but it's grueling work and it's sure as hell not guaranteed to succeed.