Every single bit of it brought on by themselves. They have started every single squirmish. When the border was open they continuously attacked and kidnapped Isrealies. They refused every peace plan offered.
Egypt certainly isn’t asking questions of oddly shaped boxes being delivered by trucks disguised as Red Crescent vehicles.
Although I’m not sure if it goes to top. There’s elements of the Egyptian military who have good relations with their IDF counterparts and others who don’t. It’s a question of who is turning a blind eye and saying “eh it’s not my problem, let them Jews deal with it.”