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.
In this case it is fundamentally impossible, since halakha prohibits deliberate targeting of civilians-- but not collateral damage.
So if you optimize for collateral damage and all civilian casualties are "accidental," then you are wholly operating within the constraints of your moral framework and can plausibly deny all claims of genocidal intent.
However, from what I have observed, Israeli government officials have often expresses that intent publicly, despite claiming otherwise at the UN.