The position of a Rabbi is as an interpreter of Law in instances where the written text is not explicit (eg whether it is permissible to attend a pop concert) or where there are differing historical traditions (eg Sefardi vs Ashkenazi). Deciding a question of attendance at a concert belongs to halachic authorities whose qualifications speak for themselves. It is not in the realm of hasidic leaders, although they may be called upon to support the decision of halachic authorities. Whether or not the influence of the inherited hasidic leadership is waning is a separate discussion and is totally irrelevant to this event.
Iraqi police fire tear gas as thousands of protests burst into Green Zone, storm Parliament (AP)
from the article: The ultra-Orthodox arrived en masse