Killing fleeing soldiers, very heroic!
You make it sound like mowing down basically defenceless men. Amongst other things, it was a retreat of an armoured column, by an enemy, in a country that the eneemy had invaded, in a war that was still fully engaged. Keep in mind that surrender was an option, and that war is not like a boxing match with a referee. Here are some details from the time:
The wreckage found on the highway consisted of at least 28 tanks and other armored vehicles with many more commandeered civilian cars and buses filled with stolen Kuwaiti property.
The death toll from the attack remains unknown and controversial. Some independent estimates go as high as 10,000 or more casualties, but this is a highly unlikely number. A 2003 study by the Project on Defense Alternatives (PDA) estimated fewer than 10,000 people rode in the cut-off main caravan; and most simply left their vehicles when the bombing started to escape through the desert or into the nearby swamps where nearly 500 were taken prisoner. The often repeated low estimate of the numbers killed in the attack is two- or three-hundred reported by Michael Kelly, but a minimum toll of at least five- or six-hundred dead seems more plausible.
An aerial view of a destroyed Iraqi column consisting of a T-72 tank, several BMP-1 and Type 63 armored vehicles, and trucks on Highway 8 in March 1991
Iraqi forces including the elite Iraqi Republican Guard's 1st Armored Division "Hammurabi" were trying to either redeploy or escape on and near Highway 8 east of Highway 80. They were engaged over a much larger area in smaller groups by U.S. ground forces consisting of nine artillery battalions and a battalion of AH-64 Apache helicopter gunships operating under the command of General Barry McCaffrey. Hundreds of predominantly military Iraqi vehicles grouped in defensive formations of approximately a dozen vehicles were then systematically destroyed along a 50-mile stretch of the highway and nearby desert.