Why are they perevented from working in Israel. Maybe its because when they did work by their thousands in Israel their "workers" also included hundreds of suicide bombers who killed and maimed thousands of Israelis in buses, malls, shopping centers, restaurants, schools and hotels. They resorted to terrorism and now they pay the price. Very simple. Nobody tells the Israeli Arabs where they can work so your time worn cry of Apartheid is just the usual propaganda.
from the article: West Bank settlement outpost's newest attraction: an airstrip