I cited a couple of examples in another comment. In any case, I didn't proffer that as just an opinion. It's also a prescription for how you could find tons and tons of evidence. Explicitly look into people who are not "Alt-Right" but who have been labeled that way as a means of quashing their message. This will often follow the pattern of the Boston Rally: Non white people for whom the media is pushing an anti-non-white racism narrative.