Perplexiglass posted about why non-white proud boys exist: https://hexbear.net/post/40759
switching from Obama in 2012 to Trump in 2016 predicts nonwhite to white race change. Among nonwhites who voted Obama 2012, switching to Trump in 2016 increases the probability of adopting a white racial identity from 3% to 48%.
If you read the rest of the paper, it goes on to say that this race change was most significant among Hispanics and mixed race people. Which is not surprising, as they both look closer to white and have "white ancestry" that they could choose to identify with (for the record 'white' isn't an ancestry as white is highly mixed, and same thing happens in genomics where chuds choose to identify with their 60% European, rather than their 40% MENA ancestry)
"Race change" is least likely in Black and Asian people, probably because there is no conceivable way to consciously identify as white. However, I strongly suspect that they undergo the same process UNCONSCIOUSLY, but simply don't consciously identify as white because doing so would require a very high amount of delusion.