The embarrassing thing is political. A handful of Israel haters are driving Berlin's cultural institutions to despair.
The militant screamers are a problem. But organizers who don't find an answer to this aren't doing any better. What came across as a “Hannah Arendt reading” at Hamburger Bahnhof was actually a self-imposed trap, at least that’s what it looks like in retrospect. Anyone who is unable to do this should leave it alone - and leave politics to the professionals.