The Shule sends out a notice for the coming week. It lists important days. Eg the Tzemach Tzedek’s Yohr Tzeit; that’s fair enough. Whose Yohr Tzeit does it fail to mention? Yitzchok Avinu, Reuven ben Ya’akov Avinu and Levi Ben Ya’akov Avinu. Okay, I guess we’ve forgotten about them and they weren’t Chassidic Rebbes.
Ah, but on the 18th of Nissan, we are told that it’s the birthday of Rabbi Levi Yitzchak Schneersohn ז’ל (often called a “kabbalist” trying to gloss over the fact that he said Chassidus at the same time as the Rayyatz ז’ל was Rebbe, which is a big no-no); that’s not to diminish his stature and achievements, but his birthday gets a tick, and Yitzchok Avinu doesn’t rate a mention?