Was he ordered to kill the puppy? If he was not, was he punished?
The YouTube you presented does not show the whole story, it's to provoke a repulsive and dispectable hate crime, that does not represent the vast majority of people who serve.
I watched my father put many men away in the brigg for lessor crimes.
Kyle did not kill puppies for fun, or by orders, or for mercy to my knowledge.
If all you know about troops is from watching dispictable acts, then I must ask you, why are you watching and sharing them? You must get some pleasure out of it.
Shame on you.