A) For AT LEAST 100 years (I can't remember much before T. Roosevelt) the US has often adopted a "Policeman of the world community" and a "Defenders of democracy" foreign policy that has often lead us to poke our fingers into other people's pies when they do not want our "aid." I am trying not to editorialize or say anyone is right or wrong. The history of US FP decisions for the last 100 years is well-documented and easily accessible. Flip through your old US history textbook. This is a statement of fact. For better or worse, these policies have occasionally brought down the ire of the receivers. That's also a statement of fact. Anyone who isn't aware of anti-American sentiments among people in China, Iraq, Czech Republich and other places within the world community is simply not paying attention.
B) Bearing in mind the fact that US Policy is well-known and documented over the past 100 years, and that there are people in the world who dislike "US Hedonism" as the Chinese state news likes to call it, why would it even come as a surprise for someone to claim the US had it coming? If America had no enemies, why would anyone, foreign or domestic, layout this assault? Does anyone honestly believe that all animosity towards the US came because other people are nuts and just don't get it? Sometimes, the US is the aggressor, too!
I don't say the US had it coming to them, because I feel that no matter how obtrusive a foreign government is, that NEVER calls for the obliteration of thousands of innocent people. However, opinions are opinions, and they are just like armpits. How come you are allowed to proclaim US innocence (albeit not in so many words; if you agreed with the sentiment, you wouldn't have made your post.) while anyone who takes the opposing viewpoint should be "banned for life?"
If it's going to go that way, I think people who can't be honest with themselves about their own country's history, both good and bad, should also be banned for life. One of the greatest things about America has been its ability to endure and grow from terrible things that it has done in the past, even to its own countrymen. The happenings of the past should educate us on how to behave in the future. May all that education not fall on deaf ears.