Potato: “check out psak din dot com that gives the halachic reasoning as to the Rebbe being for sure the one who will be Goel Tzedek. If you appreciate the reasoning good. Of not then it’s considered a machloikes haposkim, unless you can refute the reasoning with sources.”
It’s not called a machlokes haposkim if one side has a clear agenda to pasken a certain way, and they misconstrue Chazal, Rishonim and Acharonim to “prove” that they are right.
You might as well say that whether Conservative Judaism is legitimate or not is a machlokes haposkim as there are ordained rabbis who are Conservative. And to take it one step further, is it a machlokes haposkim in regards to J being the messiah (lehavdil, of course) because there are ‘rabbis’ who believe in him nowadays?