Well IMO it is a bit simplistic to just toss it to capitalism.
I do agree that capitalists profit from wars and historically have started wars for profit, but the current conflicts in Ukraine and Gaza are a bit more complicated.
Dead people do not produce excess value, alive people do.
I hate to think that way but if you put yourself in the shoes of a capitalist exploiting Palestinians with the help of Israel I think would be much more profitable than killing them.
Just like in Germany during WW2 capitalist interests give way to fascism and hate.
I also do not think land is the main purpose of the genocide. I think the extermination of Palestinians(and other Arabs) is the main reason, taking the land is a very good additional incentive.
But neither I nor You can know what happens in the heads of genocidal maniacs so we can only guess.
We can only guess based on the economic structures, trends, and stated goals going back to the founding Zionists. It has always been a land grab, they are always seeking new land to sell and fuel its settler-colonial economy. Never attribute evil to madness when you can analyze the material and economic basis for it.