Joseph,
Vital U.S. support for Israel in its war against Hamas, especially from elected officials, is tenuous and depends on votes. When our enemies can muster tens of thousands to D.C. who angrily demand an end to this support, a counter rally must bring even more voices in order for this support to continue. Davening and learning are unquestionably our weapons. Yet due to the “great concern about the extremely volatile political climate here in the United States”, organizations such as Agudah “feel it is important, midarchei ha’shtadlonus, that there be a large turnout at this event”.
It’s not hard to understand.