You confuse two things. A gun does not mess with your mind unless you are a megalomaniac. Alcohol does mess with your mind. As does all drugs. For example, there are people that claim that weed can make you schizo. And that is not true unless you already have an underlying condition that is triggered by the weed. The same goes for all drugs. And as with all drugs, even weed can cause changes in the brain when used very long time. It depends on the person however how these changes will manifest it self. Some people are permanently laid back. Others become hostile when not having smoked for some time.
When people turn aggressive when consuming alcohol, there is something wrong with them. When you drink alcohol and become drunk, you loose your boundaries and reason.
Some people are uptight, so they drink a little bit to become relaxed in a social situation. but the keyword is little here. Responsibility. You are responsible for your actions, even when you are drunk. There is no excuse.
If you have a problem, if that may be stress, anger, anxiety or a real mental disorder, you should be aware that alcohol might worsen your problem.
Look, i agree that in the west, we might consume too much alcohol too often. But we do that because we live in a high stress civilization. Hence the stress related diseases that are too common here.
And in a lot of muslim countries, other substances are used instead of alcohol. It all comes down to the same thing. Muslims are also human, they also need something to let go, to relax. But then again, there is a lot of anger and frustration. If i look at the middle east, i see an Ireland of the recent past where Catholics and Protestants where willing to hurt and even kill each other while believing in the same god but having a different interpretation. And using the religion for political reasons.
The countries that do well, are usually oil nations with a lot of wealth. Crime exists everywhere where poverty exists. Nature is constantly rolling dices. With humans, that means brain configuration.