This incident happened at 3am, and was perpetrated by a small group of extremists who then disappeared into the night. In Egypt, during DAYTIME hours the streets were filled with violent mobs baying for the blood of the infidels, while the churches burned and the police & army pointedly stayed away. Completely different atmosphere. You can't keep a lid on all your freaks all the time, but the sheer scale of events in Egypt suggests it is far more than an anomaly over there...
U.S. police captain's son pleads not guilty in ISIS group plot (AP)
from the article: West Bank mosque set alight in suspected 'price tag' attack