The Rebbe decides who his talmidim are.
Someone who “claims” to be a talmid doesn’t automatically make him one, nor should that be indicative of the Rebbe.
Some clown a few years back who called himself a talmid of R’ Moshe Feinstein, decided to allow women to remarry without ever receiving a get from their original husband. If this makes you view R’ Moshe as any less of a person due to this clown, then you Popa are an idiot