This makes me think of Chechnya, a people with a long history of oppression and genocide at the hands of the Russian state. They attempted to get independence in the 1990's, in a relatively civilised way at first, but then the Russian state invaded, killing the 'moderate' leadership and creating a power vacuum which was filled by Islamist fundamentalists. The latter initiated terrorist attacks on, amongst others, theatre goers in Moscow and school children in Ossetia. They were then destroyed by the Russian army. Any sympathy most outsiders had for the Chechens was lost by these terrorist attacks on civIlians. Never mind that the Russian army was wantonly destructive and murderous.
Similarly here, the attacks on festival goers will be the pretext for far greater atrocities carried out by Israel.