My understanding is the defense made by Zionist parties is more that Hamas has culpability in the starvation. I haven't seen this claim verified or debunked sufficiently to have a strong opinion about it but it at least seems within reason to me that Hamas is acting in bad faith and is weaponizing starvation of Gaza residents.
Perhaps the fact that the Israeli state are the only ones making this claim, and many multiple experts, humanitarians, countries, leaders, are saying the exact opposite should be sufficient enough to debunk the claim.
