Israel is certainly not using starvation as a weapon of war. On the contrary, it has allowed into Gaza tens of millions of tons of food since the war began. It has also instituted with the United States the only means of delivering food safely to Gazan civilians to stop Hamas stealing it for its own purposes!
There is no evidence of starvation. Images of skeletal children published by The New York Times, The Guardian and other media outlets were fraudulent. These children weren’t skeletal because they were being starved in Gaza. They were either suffering from dreadful congenital diseases, or the pictures had been taken in Yemen.