The cops actually claimed to prevent antisemitism by clamping down on hate speech. BTW, they, among other things, did that by laughing at Jews with quippahs in Palestine colors who were present at the congress. The cops also later admitted that there was no case of hate speech at the conference. But surely there would have been one if it would have gone on for the planned three days instead of the actual two hours after which it was shut down, i can't imagine German cops being in the same room with a bunch of leftists and Arabs for three days without the cops using any slurs.