This is business, war is another way of making money by the government by influencing them and use it as a demonstration of their advanced defence system so they can sell it to other countries.
Besides utilizing the war as a demonstration, this is the way to seize other people's territory. There should be many reasons to seize the territory, one of them because they can get natural resources from the region. This is also a kind of making money from the war.
Anyway, with the war, a country like US can earn money because they can sell weapon. Israel needs weapon to continue the war, US get huge money from their weapon business.
War is not a solution for anything and I assume even people in the country involved in knew that which is why most of them refused to participate in anything but still this thing goes on without an end.
If we are talking about Palestinian people, they have no way to participate to the wars. They have nothing to fight, they even have no water and foods. They are only the victims, they have no power at all.