Remember the Alamo?

What the hell was Reagan High School Principal Robert Pambello thinking when he flew the Mexican flag at his school?!? And what are these crazy, protesting kids thinking? Do they even know why they are protesting? If they want immigration to the U.S. to be easier for "their people", shouldn't they be waving the American flag? After all, they are trying to get TO the U.S. - AWAY FROM Mexico! Am I missing something?