There was no "genocide" in Gaza, despite the high number of dead and injured. Israel in general, and the IDF in particular, did not act with the aim of "eliminating entire religious, ethnic or political groups," and there was no intention to "destroy the [Palestinian] group as an entity."
There was probably no "ethnic cleansing" in Gaza, "as a result of which citizens of certain groups are prevented from returning to the areas from which they were expelled."
However, "domicide" (house/murder) apparently took place in the Gaza Strip. The term describes the deliberate destruction of civilian infrastructure in a given area, in order to make it uninhabitable for civilians.
In the Swords of Iron War, 60 percent of the houses in the Gaza Strip were destroyed or damaged (74 percent in Gaza City itself). This included the destruction of entire neighborhoods. Schools, hospitals, mosques, cemeteries, shops and offices were repeatedly hit, from the air and from the ground.
This is a greater destruction in fewer months than what Bashar al-Assad's army has inflicted on the city of Aleppo, Syria, during the three years of fighting in the region (during which, starting in February 2016, some 500 residents have been killed, tens of thousands have become refugees).
Similarly, Israel has dropped more ammunition on Gaza in a few weeks than the United States dropped on Afghanistan (in the war initiated by the United States following the September 11, 2001 terrorist attacks) in an entire year.
Legal experts are seeking to define "domicide" as a "war crime." Such a definition, if and when accepted, would apply to both the Israeli political and military echelons.
