Imagine being in a total war zone and totally tripped out on psychedelicic drugs.
And you've never tripped in you life so you have no idea that your subjective mind can be manipulated by chemical reactions, that what you see may not be real, that what you are may just be a figment of your own imagination.
For the first time in your life you are forced to imagine a way to look at life, the universe and everything from outside the eyes in your own head.
And the drugs that the military is giving you is elevating your violence level by orders of magnitued that you've never even thought of. You can't control your own actions.
All you see is anger, rage and more energy than you can stand.
Imagine that you've been in a hostile foreign country for years and you've been fed psychoactive drugs for most of that time.
And you've been given a gun and told, over and over again, that anyone native is the "devil".
What would you do?
Personally I think I'd be split between trying to bring peace and happiness, or going out and killing everyone.