Right on! This kind of behavior is wrong regardless of who the enemy is. (Not that ANYBODY knows for a fact that the man in the picture is an enemy.)
This is sad. Once upon a time, such things didn't have to be explained to people.
Far more posts are being improperly chracterized as approving of the abuse when they clearly disapprove of the abuse. These posters apparently don't satisfy the "purer than thou" critics who for some reason seem incapable of noting two important facts: first, the abuse was uncovered and stopped by the US itself without being prompted by public outrage; second, the offenders are being appropriately sanctioned and prosecuted.
Yes, the system is working. And it is working in a rational, well-ordered way.
Good job, America.