This was perpetually going on within the Shia-Sunni turf war that happened during the US occupation of Iraq. We as a species are capable of some pretty horrible things.
Here’s one about the army that’s more graphic: https://en.wikipedia.org/wiki/Abu_Ghraib_torture_and_prisone...
No one has been prosecuted for the war crimes the CIA commited. Although some low-level army personnel were court martialed for the Abu-Gharib torture, none of the clearly complicit higher-ups were even indicted. In the case of the CIA’s torture program, it is clear that those at the highest levels of government sanctioned these war crimes. Bush, and those around him, should be in prison for their disgusting, shameful actions.