""The US wants the regime to stay at all costs," said As'ad AbuKhalil, a professor of political science at California State University and author of the Angry Arab News Service blog. He said Egypt's peace treaty with Israel was one of the overriding factors in this calculation. "The optimism of Arabs, and Egyptians in particular, has to be counterbalanced with the extent to which Israel and America are not going to let change come to Egypt.""