Your kids would have a better life than you. If you instilled a good work ethic in them, then they would go to college, and start out at a higher level than you did, and your grandkids would have an even BETTER life.
But that Dream lies in ashes for many of the working class (and lower middle class). They see their jobs given to illegal immigrants, or shipped overseas. They see less-qualified minorities being given the promotions, due to Affirmative Action. Their kids are condemned to a lifetime of paying off student debt, because they are not back enough to qualify for financial aid.
And they are pissed off enough to want to SMASH the system which has betrayed them.