BEIRUT — Eight months of unbridled war, widespread death, destruction and suffering in Gaza have captured the world’s attention. But across its northern border with Lebanon, Israel has also been engaged in a much more subdued conflict with a different Iran-backed militia. 

This lower-level fighting — when compared to the combat in Gaza — has nevertheless led to lethal violence on an almost daily basis with regular rocket fire from Hezbollah and artillery and airstrikes from Israel….