Thank you for your opinion (stated as a fact, I'll add) that Israel doesn't occupy Gaza. Can you please state your source for this belief?
To state why I believe Israel is occupying Gaza, I'll point out that Israel’s continued status as an occupying power has been affirmed repeatedly by the United Nations, the International Court of Justice, the International Committee of the Red Cross, and human rights groups. Do you believe all of these entities are incorrect?
Hamas did steal from some of the smaller organizations that donated aid, as those groups were not always on the ground to oversee distribution, according to the senior Israeli officials and others involved in the matter. But, they say, there was no evidence that Hamas regularly stole from the United Nations, which provided the largest chunk of the aid.
What is your source to justify your claim (stated as a fact) that Hamas is diverting supplies and then selling them? Here [1] is a recent article in the NYT this week quoting two unnamed Israeli military officials saying Israel has found no proof of this claim despite Israeli officials repeatedly stating otherwise, and that the UN had been largely successful (via UNRWA) in feeding the Gazan population.
".... are no serious reasons for fearing:
(a) that the consignments may be diverted from their destination,"
i.e. if the warring party believes the supplies will be diverted they have no obligation to supply them.
And that's what is going on here.