Friday's attack on a Sinai mosque was Egypt's deadliest in recent history, with over 300 people killed. Middle East analyst HA Hellyer looks at the significance of the target and the likely consequences.
The intensity of this Friday's attack in Sinai is unprecedented in modern Egyptian history - never before have so many people been killed in such a short time by any terrorist group.
Regrettably though, this is not the first time that a mosque has been targeted by radical extremists. Iraqis know this; Syrians know this; as do many other populations around the world.
The scourge of radical Islamist extremism has been felt far more by Muslims than any other population. Muslims, by far, are its most numerous victims. And Muslims, most of all, are the ones fighting it.
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