So there I was, on the ICJ website, reading up on "genocide" when I noticed that this was the first of the 5 elements that could constitute genocide:
"Killing members of a national, ethnical, racial or religious group;"
So that means that any time Hamas attacks Israel (note the national group, "Israelis") in fact, any time any country battles with any other county, the ICJ can call that genocide. In fact, since any act of murder is perpetrated on a member of some group, every act of murder is, according to the ICJ, possibly genocide.
I haven't yet seen the ICJ pursue all those potential genocides...