TBH it's not that different from Korea or China in general, countries I've also lived in. Those 3 nations (ones I can speak for at least) are homogenous, not "nations of immigrants," they haven't had turf wars for minorities, civil rights & political correctness movements. Just the casual daily encounters experienced there as someone who is trying to live there (not someone who is clearly a tourist), would completely baffle any politically liberal, tolerant American.