This is very troubling. So apparently the president can go around the world assassinating American citizens. Awlaki was a terrorist no doubt about it, he wanted to kill Americans. But he was an American citizen and the Fifth Amendment to the Constitution states that no American shall be “deprived of life, liberty, or property, without due process of law.” The U.S. government apparently knew where he was at so why didn't they make an attempt to arrest him? We are after all allies with Yemen. I don't know, I'm conflicted about this.
Ummm...so lets see. They guy joined a terrorist group that part of their purpose is to do harm on us. He's outside the country, and in a place that either can't or won't deal with him for whatever reason. He consorts with and is around terrorist. He plots to do further harm to the U.S. and it's people. He encourages others to do violent harm to us. Despite what you may think I doubt we could have just walked up to him that easily and cuffed him and brought him back, and even then it would have been a military operation in another country where we don‘t have jurisdiction, and it would have much more greatly risked the lives of American soldiers.
It would be the equivalent of me joining the other side if this country ever gets into a war, walking into the other sides base to help them inflict harm on my former country, and then feeling like my rights are being violated if the U.S. bombed the facility while I was in it to get to me because I technically might not have renounced my citizenship.
If some criminal holes himself in a house and doesn't want to come out when he knows the police are outside and then fights when they come after him, I'm not holding it against the police if that person ends up dead in the struggle. I don't see this as much different.