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.