Starving a civilian population as a means to compel a peace deal is a crime against humanity and has been recognized as immoral almost universally throughout much of human history.
Not to mention that Israel’s government probably could have gotten a peace deal by now but is pretty openly prolonging the conflict to enable ethic cleansing of the Gaza Strip.
Perhaps you could fill in a few of the details for us?
What Israel is doing in Gaza goes far, far beyond any legal definition of war. The per capita mortality rate of Palestinian civilians currently rivals the Holocaust.