A comment about a culture is not the same as a comment about race. All teh negative comments about the Chinese Einstein made were about their cultural norms, and at no point has he, as far as I know, suggested that they had to do with their racial heritage. That would be racist. I think criticizing culture is and should be ok, even necessary.
Interesting point. But then, not everyone who comes from a particular country and culture is the same. This is prejudice no matter how you cut it. It's more like Trump's attempted ban on "Muslim nations" than a ban on or hostility towards a race.