The group that crystallized around them as an activist vigilante group adopted the symbol of the Stern Gang as their emblem. The main function of their attacks on Arabs was revenge, and the attacks were designed to inspire fear in Arabs. American Jews spearheaded fund-raising for the group's underground activities, justifying their backing of such terrorism in terms of personal friendships. The organization also had assistance from two senior figures in the Military Administration that oversees the occupied territories, together with help from several reserve officers, and one career officer. Their activities ranged from placing incendiary bombs in vehicles owned by members of the Palestinian National Guidance Committee, an assault on Palestinian students at a college in Hebron, and an operation that nearly succeeded in blowing up the Dome of the Rock Mosque on the Temple Mount/Haram al Sharif. An attempt to booby-trap a bus that transported Palestinian workers in East Jerusalem was discovered by the Shin Bet in 1984, and the exposure of the Jerusalem bus bombing operation led to a crackdown and trials which effectively ended the group's operations. The idea also circulated that acts of terror against Palestinians would hasten their exit from their homeland. The movement rejected the democratic foundations of Israel.