I agree with Serb, it would be more satisfactory to burn the flag of islam.
If he did this here in Germany he risks 3 years of prison!
Burning flags in Germany isn't allowed?? Huh?! What about the anti Israeli / Pro Gaza protests in January in Duisburg? They burned an Israeli flag!
Surely it is forbidden. This is the case of severe offense towards a nation/racial/religious group. And this can be punished by up to 3 years. And a Rabbis would surely be punished the highest possible since "he should be an example for others". If a stupid adolescent or child does it, there will be mostly social services or money as a punishment.
If you burnt a pally or turkish flag you would be punished, but if a multiculturalist or pally does it, the authorities ignore it. You should know very well we have to two measures for one and the same thing!