> There is, however, a pretty big gulf between the stuff the US has done and engaging in ethnic cleansing and running concentration camps as a matter of policy.
A big gulf. Hmm. A big gulf. Umm, maybe you mean the Gulf of Aden? That's kind of big, and it's right near where the US participating and supporting the ethnic-cleansing-level siege and bombardment of Yemen by Saudi Arabia.
Remember most states of the US were founded on ethnic cleansing. The US supported Pol Pot, a notorious cleanser (although more of a self-ethnic-cleansing); it carried out mass bombing and poisoning campaigns in the same region of SE Asia, which constitute ethnic cleansing; it starved out the Iraqi people for years, which is borderline ethnic cleansing; it's doing the same to Venezuela right now; it supports Israel, an ethnic/religious-supremacy state held up by keeping the indigenous people of the country outside of it, as refugees - to ensure a demographic majority for the privileged group; it has supported Myanmar/Burma, while it ethnically cleanses the Rohingya; it has supported and still occasionally supports Sunni fundamentalists who aim to cleanse non-Muslims, Shia etc.
As for concentration camps - the US is infamous for its concentration camps. Mostly in countries it occupies, but also for a significant fraction of its citizenry - over 1% if I'm not mistaken. They're more class-based than strictly race-based, but still.