I'm inclined to heed the Egyptian expert's warnings. The established Arab regimes (dictatorships, really) in the region have set up the Iranians as a bogeyman for several years now (I think, for example, of King Abdullah of Jordan's fulminations about the impending doom to be caused by the "Shiite Crescent" led by Iran). Innocents? No. But intent on launching terror attacks against Egypt? But if Egypt wants to accuse Iran of such dirty work, you can be sure that the Israeli press will be happy to provide a bullhorn to get that news to the West.
I'll be curious to see how much play this gets in the US MSM.