Demonstrators call for his ouster, a demand previously muted in the strategically located kingdom, which has mostly avoided the "Arab Spring" unrest.AMMAN, Jordan — In a sign that the U.S.-backed kingdom of Jordan may yet be vulnerable to the "Arab Spring" upheaval, angry demonstrators Friday denounced King Abdullah II and his ruling circle as "Ali Baba and the Forty Thieves" and demanded swift reform or an end to the monarchy.