Even electronic intifada and the festival-direction confirmed that Horowitz was beaten, what is being disputed is wether the guy who struck him down was "arabic" or not. Well, is it any better if he wasn't ? And what makes these people so sure about who he was. Do they actually know his identity ? Maybe Horowitz was right, maybe he was wrong thinking the guys who insuted and attacked him where of arabic (or rather maghrebin) origine. In a situation like that you don't have time to look closely. Are you going to make a fuzz about a possible error of appreciation ?
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: Israeli movie director beaten by Arab youths in France