Here’s the mistake some posters here are making (maybe based on mistaken Lubavitcher online poster):
You think the reason why Lubavitchers follow, trust and obey the Rebbe is because of a complicated pilpul that the Rebbe is a tzaddik of Tanya, and a tzaddik of Tanya can’t sin, so he is infallible, which means we must trust him because he can’t make mistakes.
This entire premise is wrong. Chassidim trust the Rebbe simply because that’s how a devoted talmid relates to רבו המובהק.
Chassidim follow their rebbe with אמונת חכמים, they feel that כל המהרהר אחרי רבו כמהרהר אחרי השכינה, and they apply to their rebbe לא תסור ימין ושמאל.
Is this some sort of weird “neo-Chabad” cultish idea? I doubt it. Ask the historians. I feel like this has been the behavior of many chassidim to their rebbes, and talmidim to their teachers.
You’ll probably say I’m absolutely wrong. I’m not a great historian so it’ll be hard for me to argue.
P.S. I have said many times that I have strong opinions on the whole Moshiach issue, but I feel that it is too complex a topic to express here on an online platform, with lots of background that must be understood before my “psak.” Therefore, I will not be going into it here, as always.