Not sure what you mean by white washing, need I list every sin of the US before speaking a single whisper of criticism of China?
Like, for example, how in up until 1975, the US sterilized Native America women. Need I list all the consequences of that, before condemning the fact that now, today, China is doing the same, and worse, to the Uighurs?
The crimes of our past, then, do not mitigate the crimes of others, now.
Again, the United States is not perfect by any measure. But if perfection is required to denounce the crimes of others, then all we'd ever hear is silence.