...because it means so much to pee on your enemy after you've killed him. That'll teach the Taliban.
These are soldiers who are part of the same group of people who we're supposed to love and support for their service to our country. These are soldiers who supposedly joined the Army because they sought to do honorable and good by defending our nation. These are soldiers who are part of the Army belonging to the "greatest" country in the world. These are soldiers who inspire patriotism because of their sacrifices.
Way to protect the Empire, boys. Assholes.