This is not about being racist but about ensuring security in a place that has seen its share of disasters and unfortunately for you the perpetrator is almost always of Arab decent. I was not there when you went through this checkpoint and so I don't know if I would react differently towards you buy what would you do in his shoes following the recent events? You live in a place that is far from the norm, don't expect normalcy especially at this point in time.
Roadside bomb kills five border officers in western Iraq (AP)
from the article: I am not the enemy