I, too, loved watching this series and thought it was refreshing that the three hosts are from diverse backgrounds. They always had some unique choices, but I have to admit Luis wasn't my favorite. He always picked way over-the-top choices but I get that some viewers like seeing that kind of crazy flashy rental.
Still, it's surprising to hear of the criticism against them--they're just as exuberant and attractive as other TV hosts. So I think you make a good point about resentful/bitter/racist people reacting strongly to their being BIPOC.