Anti-Jewish bigotry, whether casual or vicious, knows no party loyalty.
In contrast, Palestinian flags will be permitted at the event.
In 2017, the Chicago Dyke March booted participants for waving LGBT-themed flags bearing the Star of David. Event organizers at the time said the flags were too similar to Israel's, which made other attendees “feel unsafe.”
Shockingly enough, instead of looking to what happened in Chicago and recognizing it for what it was (i.e. anti-Semitic), D.C. Dyke March organizers actually say they took their cues from that event.