@non political
As for your other well articulated points, you are correct.
Again the remarks were made in 1950. I’m not aware of any such gathering of rabbis that said these remarks were cvs against halacha. And I am aware of many Rabbonims high regard for the Rebbe. I also am not a Rav myself, I know very little, and I think my Rabbonim would best know what situations are halachically binding etc