If Jews want to live in the West Bank, they can, however they will have to abide by Palestinian law just as Palestinians in Israel have to abide by Israeli law. Meaning, when those settlers commit crimes, the Palestinian law enforcement officers have all the right to arrest them and the IDF cannot intervene. The Palestinian state will be a secular state so the settlers and their religious zealots can't use "God's laws" to override the Palestinian legal system. Comprende?
Five people killed in car crash near Hebron (Haaretz)