Krsna – The Supreme Vedantist
In the Gita Sri Krsna has asserted that He is the original compiler of Vedanta philosophy and therefore He is the Supreme Master of it.
Discussing the faults of a Vaisnava without a virtuous intention results in vaisnava-aparadha.
It would seem that Sankara’s detractors were correct in assessing that his philosophy was crypto-Buddhism.