I disagree. It is a matter of perspective. If you aren't prepared and there with a specific mission then you shouldn't be there. After that, forget empathy and sympathy. To paraphrase Patton, leave that to the other guys.
What about surgeons, EMT's, cops, etc., that witness that stuff all the time. Would you say they are not right?
My point was, everyone that's been stationed in Iraq has probably suffered emotional trauma; Most of them don't turn to crack or violence against random women, and this piece of waste shouldn't be allowed to claim that as an excuse.