I'm sure it has been said before but young men are the most dangerous force on the planet. This can be said of the young men of all nations.
Those in power know this, of course, and recruit such young men into their armed forces. You really don't want to live in a country like Somalia, Liberia, Chechnya or the Bosnia of a few years ago where young men are/were just supplied with automatic weapons and unleashed ...
Hopefully, football hooligans mainly fight each other? I hope so, I loathe and detest football and would rather have root canal work at the dentists than go to a football match.