The bombing of a Russian passenger jet over the Sinai was most probably the end result of a stealth jihad operation. That might seem like a strange way of putting it, because we usually think of stealth jihad as something that radical Muslims do to subvert non-Muslim societies. Yet, unless there were already a stealth network in place, its unlikely that an ISIS operative would have been able to get by security and place a bomb on board the Russian plane. Although ISIS has taken credit for the bombing, they probably did so with the help of another group -...