I wouldn't call it picking. Picking on someone is when they are being abused for simply existing. US on the other hand doesn't simply exist. More then any other country in the world today, US has it's head in a lot of foreign issues. It's not all bad, some of US's work is quite good.
But then there are dark spots that people aren't willing to let go. Think 9/11 for them, and you get their mind set.