I agree, however the claim is not war crimes, its genocide. People think that using genocide to simply mean lots of killing and destruction and war makes them morally superior, but genocide entails "intent" and we need a vocabulary to differentiate between the two.

Overall, intent is quite hard to prove. You would need to access internal documents and communications that explicitly direct the military. That's probably not going to happen.

However, from what I have observed, Israeli government officials have often expresses that intent publicly, despite claiming otherwise at the UN.

I am sorry but did you look at pictures of Gaza? Do you not see them actually CONCENTRATING the previously 2 million people there into a gigantic CAMP?