The deeper point is that it doesn't matter if the promotor of a policy "are in fact good". This is largely unknowable and the tribe-based proxy that many people

The deeper point is that it doesn't matter if the promotor of a policy "are in fact good". This is largely unknowable and the tribe-based proxy that many people have come up with ("my tribe is good, so the policies my tribe propose must be good") is rather insufficient. What matters is if the policy is good.