Question

I recently became aware of a person known as “the Yenuka,” and I looked into him a bit. I discovered that while he does have knowledge, it is not at a level that justifies the honor people give him. For example, from my acquaintance with Rabbi Bunim Schreiber, he knows many times more than that, and no one thought to call him “the Yenuka” or “holy.” Beyond that, there is a whiff of something improper about him, somewhat reminiscent of Shabbetai Tzvi, Berland, and the like. (Why does a person have to give a talk with candles, and how is it that we have not seen any of the great rabbis conduct themselves in a setting where before the talk people sing in his honor for half an hour, and so on and so forth.) My question is in the nature of seeking advice, since I have seen that even among the Torah-observant public people attribute importance to him: is it appropriate for me to express my negative opinion about him, and would there be benefit or harm in that? Also, I would be glad to hear the Rabbi’s opinion about the above.
Thank you in advance