I understand that saying “yes” is not universal; only some go so far or admit to it to outsiders.
And among those there are a few different attitudes, with complexity…while i in no way use the term to connote sophistication; a scribble is also a complex mix of lines.
So asking menachem to say he definitely thinks the rebbe is moshiach is unfair from his perspective, because there’s a grey area and a mound of….”information”… surrounding neo -chabads teaching on the issue.
So asking for a “yes” doesn’t solve it. And most will say yes to accepting moshiach “whoever that might be.”
But a definitive “no” from someone in the “anti” camp is something I’ve yet to hear.