I think it's hard for even Americans to wrap their heads around how big the country really is, and how diverse it is. While typically less racist, you still get a ton of it in various places, less about the place and more about the individual person.

It's also hard to compare the US to other places. Japan and many other places are very homogenous societies, the US is the polar opposite and wears that with pride. At a high level you can say "Americans aren't racist" and that would mostly be true, but in the details everyone is different.