YB:
“1] Can you point to where in tanya it says that a tsaddik of Tanya is INFALLIBLE ?”
A tzaddik is totally in line with Hashem’s Ratzon, so his “mistakes” don’t come from yetzer hara but are also directed by Hashem (remember Aharons argument to the malach hamoves?) There is a rare scenario of a tzaddik not advancing in his avodas Hashem, and slipping to do an aveira (like Yochanan Kohen Gadol), but it would be obvious as the Posuk states ba zadon vayavo kalon.
For a regular YB to think HE knows, or anyone that didn’t top The Rebbe in yiras shomayim, knows, that The Rebbe made a mistake, because He knows better, is utter foolishness, but just arrogance and bizui TC. I hope that clarifies.
“2] Can you point to any source acceptable to all hugim in Yahadut that your leader qualified as a Tsaddiq of Tanya ?”
Is there any public widely known instance of The Rebbe doing any aveira? Those who know The Rebbe say not… besides for the sheer holiness etc
“3] Is the concept of ‘tsadiq of Tanyah’ widely accepted in Yahadut – outside of the hasidi circles ?”
The Alter Rebbe is widely accepted. How many tzaddikim of Tanya there are today is a different question which I cannot answer. I keep my nose out for them.
“4] Is the tsaddiq of Tanya explanation the only available one to explain the relevant ma’amarei hazal ?”
Not sure what you mean. And even if it is, it answers.
“5] If there exist other explanations , how are they more deficient in actually explaining the relevant ma’amarei hazal when compared to the Tanya’s [besides that they will not serve the habad cause]”
No one is making you become Chabad. As for me, it’s my honour and privilege.
“6] Why do you employ the condescending attitude that it is the opposite side who has ‘go and learn’ ?
Maybe it is actually YOU who should ‘go and learn’ ???”
See the answer to 1, and you’ll know why.