Many people do not understand the roots of their own frustration, hence their rebellion is directionless. They know that they want to rebel, but they don't know what they want to rebel against. Luckily, the System is able to fill their need by providing them with a list of standard and stereotyped grievances in the name of which to rebel: racism, homophobia, women's issues, poverty, sweatshops…the whole laundry-bag of "activist" issues.
Huge numbers of would-be rebels take the bait. In fighting racism, sexism, etc., etc., they are only doing the System's work for it. - Uncle Ted