Why The Hell Not?

From Fox News: At least 13 people were killed and 36 others were wounded when gunmen attacked the American University of Afghanistan in Kabul, Afghan officials said early Thursday.
The U.S. military was assisting Afghan forces who responded to the attack, U.S. Army Colonel Michael T. Lawhorn told Fox News. "These advisors are not taking a combat role, but advising their Afghan counterparts."  http://www.foxnews.com/world/2016/08/25/at-least-12-killed-36-wounded-in-attack-on-american-university-in-afghanistan.html
Why wouldn't the U.S. Army take an active role in killing terrorists?
Did the U.S. soldiers say something like this?  "Oh, Mr. Afghan soldier, there is a bad man with a gun who is about to shoot us because he thinks we are infidels.  Will you please shoot him and be nice about it?"
Bunch of morons in the Army and White House.