I agree they're trying to get rid of the Palestinians; you could see that with the early slaughter, and their comments to the US, Europe, and the Arab states of, "Well if you're so keen on protecting them, you take them!" And I think they're okay with starvation, if that's what it takes.
But honestly, at this moment right now I think they're trying to thread the needle: starve and bomb them enough that their immune systems are weakened (which is already done). And then just wait for some disease or other to rage through the refugee camps. Everyone is packed in so tightly, and there are so few safe places to go, that disease is just going to rip through the population once it takes hold. And Israel will continue to hold up humanitarian aid, but (at the exact same time) proclaim that they didn't have anything to do with those deaths, it's all just very very sad.