you have to prove intent...so yes can argue that they intend to kill Hamas and there just so happens to be a bunch of civilians there too but sh*t happens...but it's stuff that some in Israeli govt have said...and then there's telling people to move to an area for sanctuary and they then bomb it...and then there's limiting what aid can get in. All adds up.
You'll be fine - quite a few did that this year and popped a 2x2 gazebo in there - although if there's strong winds forecast they ask you to take the coverings off them.
That's far from certain.
The civilian death rate has actually been a lot lower than what would be typical in this kind of urban warfare where combatants are so deeply entrenched within civilian infrastructure in such a small area.
So far all the ICJ have said is that it's plausible that Palestinians have rights that need to be protected. Contrary to what a lot of the media reported, the ICJ made no indication as to whether there's any prospect of a ruling of genocide. It will take them years to reach any kind of judgement because it's not nearly as straightforward as some people seem to think.
South Africa's motives for bringing the case in the first place looked highly dubious. It looked to me like a desperate attempt to boost the ANC's popularity shortly before an election, but it didn't work because they lost their majority anyway.