I guess my feelings on this are the opposite, it seems to me that intent is easier to demonstrate precisely because of Israel's poor explanations and arguments. Take the warning civilians to leave: Forensic Architecture's report, A Cartography of Genocide (forensic-architecture.org/investigation/a-cartography-of-genocide) details precisely how, rather than being a humanitarian mechanism for putting civilians out of harms way, the evacuation orders were used as a way to ensure maximum civilian harm. Therein lies the demonstration of intent.
The attempts to feed civilians is also a clear example of genocidal intent: humanitarian organisations were doing a good (if imperfect) job of delivering and distributing aid. It is since Israel blockaded humanitarian aid work (inc. the atrocious decision to proscribe UNRWA) that famine has accelerated in Gaza. No serious claim of Hamas responsibility for the looting of aid etc. has been found legitimate.
Neve Gordon and Nicola Perugini have a good article on Jewish Currents called A Legal Justification for Genocide, which does a good job of dismantling the attempt to obfuscate intent that the whole human shields, embedded terrorists, etc. argument makes. Again, the fact that those arguments are being given, and yet are so easily dismantled, is a clear indicator of genocidal intent. jewishcurrents.org/human-shields-gaza-israel-a-legal-justification-for-genocide
To me, the ease with which you can discredit Israel's claims makes the intent all the more easy to demonstrate, rather than it being the other way round. Yes, there is as much that is dissimilar about the Bosnian genocide to the Palestinian genocide as there are similarities. I only used that example because it is possible to read Mladic's defence at the ICTY, so you can see the parallels with the attempt at genocide apologism presented by Israel. For the mechanics of the genocide specifically, the Palestinian genocide has more in common with (and so we might have more to learn from), say, the Tamil genocide and the genocide of Rohingyas.