"...our mission – which is to kill the enemy.”
That's what rankles those enthralled by leftist ideology. For in their minds, WE -Americans, free Americans, ARE the enemy. Their contempt, hatred even for America, is turned to any service member who dares fire a shot in America's defense. Terrorists like the ones in Boston, are to be fawned over, considered as victims, wronged by America (somehow) while a serviceman who falls to the ground dead has no more meaning than the death of an infant in a Planned Parenthood death facility.