I was a US soldier who served in Afghanistan. I've seen our forces in action, can you say the same? Have you seen your friends in ISIS at work? They have released some video's of them removing people's heads, shooting them in the head in mass executions and even burn people alive.
If the US military was doing the same things as ISIS, it would be all over the news. Remember Abu Ghraib and how that was all over the news for months at a time? Every time the US military did something the news media didn't like, it was on the news.