Should I suggest therapy to my ex?

Should I offer a possibility of getting back together if he agrees to get therapy? He has major mental issues that caused us to have a nasty breakup, and he's too irrational and angry to see his behavior and actions clearly. Though I'm relieved to be free of dealing with the negative side, I'm saddened and wish I could help him. Should I give him another chance if he agrees to get help? Or should I let him go, and move on? I'm just having a really hard time in letting him go, knowing he's suffering and not well, even though he's hurt me emotionally.