Who said it’s not? Secondly a family mesora is just that, a family mesora.
It is reasonable to expect that such a mesorah would make a roshim in Bais Brisk in there yechs to chassidus in general and to Chabbad in particular. That would constitute collaborative evidence that it is true. Now if we had direct or public testimony from The RAV that would be something. Do we have that??
Or because he wasn’t Yeshivish maybe you don’t accept his word?
C’mon now. Do you speculate that I am MO because I CITED Rabbi Berger or Yeshivish because I questioned the Ravs alleged testimony?
Rabbi Berger is a Rabbi and a Professor. Hence his titles Rabbi Doctor
I didn’t make any claims about whether or not many Gedolim and Rabbonim agree with Rabbi Berger. I said many Gedolim and Rabbonim came out against the Lubavicher Rebbe. Surely you aware of this.