If someone lives like a king, but directly because their wealth is earned by the suffering and death of thousands, is it not morally just to stop them? At what point is the life of one billionaire worth more than the life of the, say, five hundred children that starved to death because of that billionaire? Is the system of economics that results in that not utterly reprehensible?

We want capitalism to stop killing people. It cannot stop killing people. So we must dismantle capitalism. But the bourgeoisie will defend, violently, the perpetuation of capitalism. Thus, they are taking on a direct moral responsibility for the deaths capitalism causes.

Revolution is only violent because capitalists wield violence to brutally suppress even peaceful protests, and we must respond in kind to defend ourselves. The violence of self-defense is not the same as the violence of oppressors. If the capitalists saw peaceful protests and willingly put their fortunes aside and returned their means of production to common ownership, there would be no need for revolution. But in all history of this struggle they've chosen instead to maim and murder protestors.

As a snapshot, Food Not Bombs are an anarchist group who do nothing but give food to the unhoused. Police will arrest every FNB member to stop them, when what they're doing is literally just feeding the poor. But if FNB members carry firearms, police leave them alone, and the unhoused receive food.