Medieval Christian Europe persecuted its Jews because it considered them responsible for the alleged acts of completely different Jews in the Middle East. The Chicago Dyke March just did the exact same thing to American Jews. While these people present themselves as the farthest thing from medieval theocracy, they are actually reenacting its worst pathologies. Being progressive does not insulate you from falling prey to bigotry anymore than being conservative does, which is why this particular expression of anti-Semitism continues to be a staple of even enlightened European discourse, from the BBC to Swedish public radio.
Yair Rosenberg, “Four Reasons the Chicago Dyke March Was Anti-Semitic”, Tablet (28 June 2017) [http://www.tabletmag.com/scroll/239298/four-reasons-the-chicago-dyke-march-was-anti-semitic]