That was almost 80 years ago, whereas China is doing this today. Past US actions don't somehow invalidate current complaints about massive human rights violations by the CCP. This is purely whataboutism.
We should be critical of human rights violations of every country, at every point in time. Past US violations are not some kind of excuse to allow China to put millions of people in concentration camps. This is a fallacious argument, the tu quoque logical fallacy.
As a non-black person, it'd be like me criticizing black people for things they do. Since I cannot truly understand the black experience in America without being a black person, any criticism I levy against them would be wholly unfair.