Great summary of motives. But those seeking revenge are in the end tolerated by those of us who accept the cover of the altruistic methods without challenging the underlying principles. As Ayn Rand phrased in a somewhat related context, it is all about the sanction we give.
It's the sanction of abdication: We gave up upon the idea that we were accountable for self-government. Why? Too busy paying taxes and buying goodies, while simultaneously frustrated by the very architectures that were supposed to serve those "good intentions." We somehow got the crazed idea that the purpose of life was to fill it with empty fun and that fighting to maintain our freedom and help our neighbors voluntarily weren't worth the trouble. Gratification begat addiction.
People forget the satisfaction that is brought in risk-taking, commitment, sharing, and building for generations to follow. It enriches every moment of life. That's why I am fighting to reverse the trend by developing an alternative to regulatory government.