The Japanese were attacked by US forces because they were at war. They were a threat to American lives and their ship destroyed. Thirty nine survived the attack. Maybe you'd say that the situation with the drug runners was the same (you'd be wrong, but we'll assume that would be your view). So
their boat was destroyed and two survived. For over an hour:
US airstrike survivors clung to boat wreckage for an hour before second deadly attack, video shows
'Two men who survived a US airstrike on a suspected drug smuggling boat in the Caribbean clung to the wreckage for an hour before they were killed in a second attack, according to
a video of the episode shown to senators in Washington.'
So this wasn't even a one-two strike. The boat was destroyed, most occupants were blown up and people watched two men struggling in the sea for over an hour. And
then decided to kill them in cold blood. Trying to defend this is unconscionable.