And why is his kuntres “part of Torah”? What authority does he have? It’s a kuntres. Hundreds of kuntresim.come out every year.
I simply don’t believe you chanced across it in a seforim store. Talk to Lakewood bochurim about chabad – you’ll get a sense for what the outside world thinks of neo chabad.
As for chasidim, there are many chasidim in Lakewood. But chasidim don’t believe in dead messiahs. Only chabad does. I haven’t met a single chassidishe yid who believes that the divrei yoel, the bobover rebbe, the imrei chaim, the imrei emes, etc..were moshiach, neither in their lifetimes or petiros.