100,000 dead to starvation. The international community would never approve that.
You are certainly correct on that point.
But does it matter anymore? The "international community" seems to approve of the Hamas attack on Israel and the ultimate extermination of that State. A great many people in the United States have the same opinions. No, I am not in that camp. But a great many of our "political elites" are in that camp.
So, what is the downside of a genocidal war against the Palestinians? The Israelis are pretty much screwed no matter what they do, and they just sent way too much of their artillery ammunition to the Ukraine in support of that fiasco. They don't have enough supplies left to endure a protracted conflict or commit to a major offensive. Nor do they appear to have capable military and intelligence organizations for such projects.
And we are not really going to help them either. The best we might do is tacit approval for whatever the Israelis end up doing. Maybe not even that much. Our carrier groups will probably stay well clear of Iranian and Chinese anti-ship missiles on the coasts and monitor the activities. Whatever intel they gather will likely be compromised to all sides of the conflict.
Siege warfare is cheap and effective, compared to other tactics. It can also be quick if done with utter ruthlessness.
We should stay out of it as much as possible.