The Unibomber had a surprisingly good insight into what makes liberals tick:

Helping black people is not their real goal. Instead, race problems serve as an excuse for them to express their own hostility and frustrated need for power. In doing so they actually harm black people, because the activists’ hostile attitude toward the white majority tends to intensify race hatred.

If our society had no social problems at all, the leftists would have to INVENT problems in order to provide themselves with an excuse for making a fuss.