Anyusername: “What I take from this is that they assumed that moshiach is the greatest person in that generation and they said Who is greater then the a arizal – if they felt there was someone greater then the arizal they would have said that it was that person”
That is a very big jump from the quote. The Sdei Chemed says that in every generation there is someone muchshar – fit – to be the Moshiach, and you somehow think that that gives the right to any person/group to choose whoever they think is the greatest of that generation. But he Sdei Chemed doesn’t even say that his talmidim held he was the greatest of the generation. Don’t forget we are talking of the generation of the Beis Yosef and other gedolei Yisroel of such great stature.
According to the Rambam, a person can theoretically be the greatest of his generation, but if he is not ben achar ben from Dovid Hamelech (and btw in Peirush Hamishnayos the Rambam says that has to be ben achar ben from Shlomo Hamelech too) he is not muchshar/fit to be Moshiach.
I have already pointed out that there is absolutely no proof of any sort that your rebbe was ben achar ben from Dovid Hamelech (via Shlomo) (that was another case where you “proved” he was by telling us he was descended from the Metzudas Dovid, despite there being no source that the MD was descended from Dovid Hamelech!) so you have no right to believe that he is muchshar/fit to be Moshiach.
If your rebbe was still alive (as the Sdei Chemed which you brought to the table says, a person who has died cannot be Moshiach) I would not have that great a problem with you saying that your rebbe is the greatest person of his generation, and as far as his tzidkus is concerned, he is fit to be Moshiach. I would totally disagree with every part of the statement, and I would think you are deluded, but I would not say that you are saying something against the Torah. But when you say you your rebbe is a candidate for Moshiach based on your perception of him without even knowing whether he fits the Rambam’s criteria, I do have a great problem, because it means that you will fit into the Torah whatever conclusion you want. And that isn’t very different to the Reform movement.
And, to top it off, he has died!