Love it or leave it is probably older than anyone commenting on this. Trump would say go back to a white Brit or anyone else. The assumption that every negative interaction between people of different races is racism is a very bold assumption.
Are people of color immune from criticism by a white person? When racist is anyone who doesn’t virtue signal their hatred for Trump is there any meaning other than the word is the shibboleth of Trump haters? Does it matter if you call out people for not hating the people you hate?