Not a function of capitalism. Function of human greed. Communism doesn’t solve this. It just moves the greed from corporations and politicians to bueareacrats.
It sounds like you’re arguing more against extreme materialism, where people believe that accumulation of physical goods holds more value than human life.
Also, citing genocide due to use of US taxpayer money isn’t critiquing capitalism. It was taxpayer money, not market or investor money. That’s government corruption, which is independent from capitalism. You see this kind of corruption in both capitalist and communist systems.
I think your main argument should be the prioritization of human dignity over anything else and an extreme vigilance for corruption in institutions of all sorts.
(Edit: what I’m about to say is a good bit wrong, but I’m not going to try and hide my mistakes. This article has a more complete history: https://www.independent.co.uk/news/world/middle-east/why-israel-and-palestine-conflict-war-history-b2426050.html)
I don’t support the violence at all, but this isn’t a (direct) result of imperialism.
After WW2, the Allies were like, “what do we do with all these Jews? We don’t want them in our countries.” Then they thought, “why not Jerusalem?” But a bunch of Arabs were living there, but the Allies really didn’t want more Jews, so they just dumped them all in modern Israel, told the Arabs this is Jews’ land now, and recognized Israel as a state. Palestine has a right to be pissed. So this isn’t so much an imperialism problem as much as a racism problem.
But still, Hamas are evil fuckers that take shit too far. Israel definitely is not the good guy and is not helping the situation at all, but this kind of escalation just makes shit worse for everyone.