As someone from a country with a long history of imperial aggression, bloated sense of self-importance and paranoia of foreigners you have to call it as you see it, and that's what the US is today.
To be fair, we British have pretty good form on doing terrible things to Afghanistan, and it wasn't exactly a source of pleasantness when we all went in this time round.
While I accept the original mission was justified for the US, I have absolutely no idea what we were doing in Iraq other than empire-building.
You don't have to believe me, just ask an Afghan.