I played with soldiers inventing conflicts using all the weaponry we had even though my Mom thought I was more delicate with quite some aggression.
While I'm for respecting individuals, face it, most boys are hard-wired to playing soldiers, do gravitate to men who are soldiers wanting to be them learning from them how to be the men we will be become.
Thus it's hardly surprising this boy is wearing a camouflage hat and enjoying handling a weapon.
We should be just left to pursue our own genders interests.