Leaders of "justice" movements want power. The best way to get power is to make an outside group the enemy and tell your followers their problems are only because of the enemy. Next, you position yourself as having the answer and if your followers will only continue doing what you say then they will be lifted, their problems will subside, and the enemy vanquished. As long as you can keep an enemy front and center and your followers problems never subside your power will continue to grow.

it's the oldest playbook in humanity.