I like Cooper, but I'm an Eastwood fan, through and through, so, I'll definitely try to see this. Men are not infallible, and neither was Chris Kyle. A hero to some, a villain to others; at the end of the day, he was a man, and this film is based on a book from his perspective, so, there's bound to be some bias. I think Leonard Maltin said it best, when there was the big controversy over Argo and the way it marginalized the Canadian Prime Minister's importance to the plan: "don't get your history from the movies." At the end of the day, it's entertainment."
+1 Well said.