A tribal mentality is normal and healthy; the notion that outsiders do not warrant community standard treatment is healthy. To be most sane about it, alter who is an insider and who is an outsider.

Psychopaths and murderers are outsiders. People of other races, backgrounds, sexual orientation are not. Who is within our tribe is the issue, not the fact that we discriminate.

Cops are ill equipped to see the community as other than "civilians". To change that, we need more group hugs and other group bonding acts. Maybe cops and civilians should give each other haircuts and foot rubs.