Arguments could be made for this in the case of the US, but it's pretty cut and dry as to IS.
There's a digest and comments more eloquent than i can muster from the guardian: http://www.theguardian.com/tv-and-radio/2015/jan/26/bitter-l...
But yes, quite an eye opener and in place beautiful and haunting. If anyone has any similar pieces i'd be interested in them though Curtis himself seems to tackle some quite interesting topics: http://www.bbc.co.uk/blogs/adamcurtis
And this is not a complete list, covers only pretty recent history and doesn't not mention any actions where the USA took indirect actions. Note that I wanted to make the statement sound provocative, see the related comments, but take out the rhetoric tone and you have proven facts. And that IS behaves even worse than the USA doesn't make the USA look any better, you are just setting the bar for what qualifies as a good peaceful country pretty low.
And by the way, this has nothing to do with a democratic society. You can have a perfect democracy and still behave evil against foreign nations. It actually is worse in the case of a democratic society because it implies that the actions were not done by a small evil regime but with support of the majority of the people.