first off, your history is wrong. Europe is one of the most violent regions in history. It was in a constant state of war from the roman empire to the cold war. The Middle east has cycled between eras of peace and eras of war, they are currently in a war era. After the rise of Islam in the middle east and alcohol was removed, the middle east entered a period of relative peace, prosperity, and golden age, for hundreds of years. While at the same time the alcoholic medieval Europeans was buttering each other, before turning to invading the middle east and fighting the crusades.
second off, your ethosocialogy is wrong. Alcohol is a poison, that damages the brain, especially the part dealing with inhibition, which creates violant people.
The smart thing for humanity would be for the rest of humanity to renounce alcohol and embrace the virtue of the sober life.