There have been a few non-white mass shooters who spouted white power shit, even just recently. Don't remember their names, but there was a Mexican-American guy who shot up a mall. A Student in Scandinavia, his bedroom was full of white power graffiti. Had a really Angloid name (first and last), but he was clearly of South East Asian background. There was also the Swedish guy, he was probably biracial (black and white), joined neo-nazi groups and went to fight in the Balkans, got jailed for war crimes.

Clearly these were misanthropic individuals who sought the most extreme form of far right ideology.