There’s a simple solution to this argument. @AviraDeArah should find three examples of Chabad Rabbonim that you do not consider messianic instructing people to ask bakoshois of the late Lubavitch Rebbe ZT”L. I’ll give you one for free, the language used on the website of the Lubavitch Ohel HaMeis. There’s plenty more on various Chabad YouTube channels.
Then, @benToiroh should print those up and delete any references to names or associations. Then bring them to three non-Chabad Rabbonim and ask their opinion on it.