There's lots of people in this world who are sad. Are you suggesting we should prioritize the aggressors over their victims, just because they happen to look like you? Or because they're at a higher risk of committing terrorism?

Also, that doesn't scale. Getting someone a therapist costs a good amount of money, getting them on meds is dirt cheap. Convincing someone who doesn't trust you very much they should go see a therapist is going to be a very hard sell.