It is impossible for a modern state to exist without a monopoly over military, police or other power, and over its use in accordance with the law. When an alternative center of power is established, causing a significant number of citizens to stop recognizing the government's authority, the government is undermined.

The democratic government has monopoly power in Israel, within the Green Line border. Within the West Bank, Israeli security forces have control in the sense that, with marked success, they protect Israel?s interests in the face of the armed resistance of Palestinian terrorist groups. The price of success is a severely oppressive regime to which Arab residents of the West Bank are subject.
But Israel does not control the several hundred thousand Jewish settlers in the West Bank. They accept Israeli rule only to the extent that it works in their favor. When they think it does not, then in the best-case scenario they ignore it; otherwise, they succeed in resisting it.