I am all for diversity but if you want a bunch of goons honestly young men is a solid pick historically.
Throw them at machine guns. Drug them up, give them machetes and guns and set them to ethnic cleansing. Give them brown shirts and have them violently intimidate people. Rev them up with hate on online forums and have them commit acts of terrorism.
That doesn't mean they aren't competent. They can be super competent. And they can be a force for good.
But some young men seem extra prone to an authoritarian mindset and are super willing to surrender themselves to the authority of older men. Perhaps some women are as well but they tend to get used differently.
The worst part about it is they look exactly like the kind of slimy fucks who'd betray their country for the chance to impress a billionaire who'll probably throw them to the wolves at the first sign of trouble