People who have been fucked over by the system often adopt a position to advocate for radical system change? Wooah, very insightful. If you care about people who are negatively affected by modern systems, then that makes their opinion and lived experience more important, not less.

You even admit that the user may be targeting the right people, so your point is what? That violence is unjustifiable? That strongly believing in a cause leads to disaster? They're not true points, but they'd be much better starting points for constructive discussion, so you can just say whatever you actually mean.

People making such pretentious, word-salad arguments as yours should not be throwing around the term 'self-righteous asshat'.