Islamic State terrorists are doing a marvelous job … of uniting the Arab world against them.

The latest expression of outrage comes from Egypt, which this morning launched a series of air strikes against ISIL targets in Libya. Egyptian air force pilots were striking in retaliation for yet another hideous video, this one showing the decapitation of 21 Egyptians, all Coptic Christians, apparently being held captive in Libya.

http://www.msn.com/en-us/news/world/egypt-bombs-is-in-libya-after-beheadings-video/ar-BBhCHE6

Egypt has struck back hard at the terrorists, joining Jordan — which this past week suffered its own tragedy with the immolation death of the young Jordanian air force pilot, which also was video recorded and broadcast around the world.

The U.S.-led coalition needs more of this outrage, although we shouldn’t wish more death and misery to bring our Middle East allies into the fight with us.

In a televised address, Egyptian President Abdel Fattah al-Sisi described IS as “inhuman criminal killers.” He added: “Egypt and the whole world are in a fierce battle with extremist groups carrying extremist ideology and sharing the same goals.”

The Egyptians already are fighting ISIL-sympathetic terrorists operating in the Sinai desert, so they’ve already been battle-tested.

It might be too much to hope for at this moment, given that the struggle ahead appears to have no end. However, ISIL’s brand of ghoulish and ghastly murder against captives well could be the sort of galvanizing series of events that finally — finally! — brings the Arab world fully into a fight that it should have joined at the beginning.

Welcome aboard, friends.