I think we can all agree that the people who commit this kind of act are the true deplorables.
I know this is horrible, but in situations like these, I often kind of feel sorry for the attacker and his family more than I feel sorry for the victims. The attacker is probably a disturbed young man who became radicalized trying to fill an emotional hole in his life. Dylann Roof, Omar Mateen... what tragedies their lives were. We all should reach out to the troubled young men in our lives and try to lead them away from a life of hatred and violence.
Plenty of people have emotional holes in their lives and don’t do this.