To the real Jews
I think you’ll find this interesting. The FJJ devotes a page to Rabbi Miller each week. It presents questions and answers from his famous Thursday night shiurim. About a year ago this was one of the questions, “Why do Lubavichers think they’re better than other Jews? He answered, “Every Jewish group should think that they’re the best. That they learn the most etc.” Clearly, the person who asked the question was attuned to the Chabad attitude that they are the “Master Race of Judaism” an idea that Schneersohn picked up from Hitler. This query was posed in 1975 so we see that Chabad didn’t become a problem just because of the Rebbe’s death. As for why Rabbi Miller gave that answer, I won’t speculate.