khadr wasn't shot by the soldiers - he was buried under rubble by the preceding aerial bombardment  and took hits from the gunships that ripped up the building- long before the americans entered the building

there were four fighters in total - three were dead , one was barely alive and killed by the CO - he likely tossed the grenade at speer

buried under rubble Khadr  had bullets in his back  blinded in one eye - - hardly capable of throwing a grenade