He's not a 'genocide supporter' just because he wouldn't stand and clap the Palestinian flag!
He was abused and driven from the theatre because he was Israeli and probably Jewish. Some of the theatre joined in the heckling and helped drive him out. Others in the row behind were upset and left.
Go through this thread and you will see credible reports from different news outlets stating that a report from a witness was made, a complaint made. The theatre apologised for the treatment of the Jewish man. The comedian is not welcome back the the theatre. The Metropolitan police are investigating the abuse as a possible hate crime/anti semitism.
What's there to go around in circles about.
If you don't condemn what you appear to think is nothing, then it grows and grows and you have hatred you see today.
Ps I also condemn the killing of innocents, before you go off on that circle.