As Operation Protective Edge holds in a temporary ceasefire, evidence has come out revealing the extent of the extremist Sunni group Islamic State’s (IS, formerly ISIS) involvement in the terror war against Israel from the Hamas stronghold of Gaza. Terror organizations associated with IS and Al Qaeda have been proven to be joining the fight against Israel in Gaza, firing rockets on Israeli civilian population centers and attacking IDF troops. […] IS terrorists have already been proven to be active in Gaza in a video uploaded by the group in July, showing them firing rockets on Israel. Perhaps more troubling...