Acknowledging that someone is an American hero based on his actions in combat, and looking at someone with great admiration through personal experiences, viewing them as a hero are two different things.
You even admit that he was a good soldier and did exactly what he was told, and did it well. In the course of doing so, he saved many American soldiers' lives. To most people that is considered an American hero. Just as a police officer did his/her job and saved someone's life, or the pilot who landed the plane on the Hudson River. They were doing their job, but in doing so, they saved lives. They were heroes. Was the pilot a personal hero of mine? No he was not, but do I acknowledge he is a hero to many? Sure I do.
Now if we are debating semantics, then I would agree, he is not a personal hero of mine. But then again the movie, "American Sniper" was not made specifically for me, nor you, it was made for the American people.
You are taking Chris Kyle and the movie too personally.