To Pekak
The Ohel is the only cemetery that “asks” people to remove their shoes. But I’ll accept that it’s only a Chabad minhag just like it’s only a Chabad minhag to think that your Rebbe is god. The reason Chabad wants people to take off their shoes at the Ohel is that they equate the Rebbe with Moshe Rabbeinu(R”L) Just as Moshe had to take off his boots at the Sneh so too we must follow suit.
To skripka
He was a genius, but calling him holy is highly questionable.