Dr Omar Ashour of Exeter University has a Foriegn Affairs article which is blistering in its portrayal of Egypt's campaign in the Sinai:https://www.foreignaffairs.com/artic...orn-insurgency

Here are three choice passages:
To be sure, guerrilla warfare is not new to Egypt. What is new is the quality, which is comparable to regular Special Forces operations.

There are many reasons for the durability of the Sinai insurgency. Of particular importance are the military capacity and resources of the insurgents, the regime’s counterinsurgency blunders, and the changing political environment in which both operate. Other elements do matter, of course, including SP’s propaganda and perceived legitimacy, but they are secondary to the others.

Even as the insurgents have waged an unusually effective guerrilla war, the regime has waged an unusually ineffective counterinsurgency. Cairo’s counterinsurgency policy in Sinai was built on three pillars: repression, intelligence, and propaganda. Intensive, reactive, and mostly indiscriminate repression was the hallmark of the policy in the north.
There is a small main thread on Egypt's Sinai problem (with 21 posts and 8925 views) and the current thread on the Russian airliner crash (with 33 posts and 2254 views).