Comrades let's make racist Japan diverse!

They have had religious mass killings. https://www.ojp.gov/ncjrs/virtual-library/abstracts/faith-fanaticism-and-fear-aum-shinrikyo-birth-and-death-terrorist

And ethnonationalism gets dark every time you play it: consider where it led Japan in the mid 20th century.

Nobody complained much when most immigrants were white Anglos and Central Europeans. The whiter the better, so it seemed.