For chrissakes, the US did not instigate the slaughter of innocent civilians! Regardless of any foreign policy they hold! Even after an attack of this magnitude, you bleeding heart liberals still don't get it- not everybody is your friend, and nor do they want to be. There are some BAD people in this world, and because of the fact that some of them are Muslim, unfortunately for their other innocent Muslim brothers the entire ethnicity is now under suspicion due to natural human anxieties.
Good god we're never going to catch these criminals if we don't start casting the net a bit wider. Sorry if this will sometimes snag some innocents, but it has to be done. Surely a few dozen people being taken off a handful of flights is better than bombing the entire middle east into oblivion? Wake up.