Ok, it's not nice to vandalize a mosque, but on the other hand, it's a thousand times worse to stab or shoot or run over some random Israeli.
Let's not, even for a second, think that Price-Tag actions and jihadist actions are equal- they are not. The world would be a much safer place if Muslim infidel-hatred was only expressed by graffiti on buildings. But they prefer to blow up churches, murder students in yeshivas, butcher families asleep in their beds, stab people sleeping on busses, shoot people working on border fences, bludgeon to death their restaurant co-workers in fields, etc, etc, etc. The list of Muslim ATROCITIES is endless. Maybe if the butchering Muslim horde didn't hate the non-Muslim world, nothing would be painted on their mosques...