USians have been conditioned to externalize all badness as originating from either other countries or "the human species" (in a vague, hand waving way) and all goodness as originating from their "one of a kind" (very generic and not lived up to at all) constitution. The only thing that seems exceptional to me in USian culture is con artistry skill. Which would fit with so much of US positive reputation propaganda revolving around pretending like some stuff laid out in the constitution means something sacred and special in practice that it doesn't mean and never has (e.g. conning people is in its roots). We're supposed to believe a bunch of genocidal slave owners were really into human rights and thought ahead on it. What they did think ahead on was their own class interests, which are not the interests of most people in the region and never have been.
Anywho, I like to point out to people that the Nazis learned from Jim Crow laws when they bring out the whole "the US is acting like Nazi Germany" comparison. Like no, sweet summer child, Nazi Germany acted like the US and the US was never a real opponent to Nazism. But if people do want to blame something the US is a big part of since its inception, but that goes beyond the US as villainy, they can point to colonialism.