All these groups sprung up after the Iranian revolution in response to Iranian policy of exporting revolution. Only thing is while shia groups were largely shut down, the sunni groups have survived to this day and are now out of hand.
Exactly. The leaders of some Shia groups are still in jail some without any proper trial. Yet our beghairat courts release terrorists because of lack of witnesses/evidence. That kind of injustice makes communities mistrust the state and they decide to take matter in their own hands.