For whatever reason, all politics is now identity politics. Less important than the effectiveness of a policy is whether that policy is threatening to the ideology that accompanies a person's group identity.
It makes me wish we didn't have names for these things for people to rally around. If you replace "I'm a libertarian" with "I'm skeptical of government solutions without sufficient supporting evidence" notice how the lack of abstraction makes it impossible to avoid focusing on the issue at hand.