@lostspark
Its RAV Shach , not Shach.
Please read the haskama of the Rav miBrisk.
[btw read all other haskamoth of rav mibrisk and compare the language]
Clear as day – if R Shach would have approved of the late leader of habad , this very same R shach with all his exact same characteristics would have merited at least “harav hagaon’ by the habadi’s .
So much for emet ….
And shows the worth of habad issued titles ….
.