It's not that it's okay, there's nothing really stopping them. In the eyes of people in the US whose opinion matters, each and every one of those men is as big a threat to the nation as the one next to them.
So using this logic, we can assume the same value is given to all these men, however these values are all negative and harmful. So you treat them as such, the complete opposite to innocent until proven guilty. You can draw an analogy between this and your Goody-Goody guy who walks home from work, and gets mugged by a few guys who take his wallet and break his ribs. That's going to absolutely shatter his confidence, so he's going to close up like a clam and take insanely OTT methods to ensure it doesn't happen again. The US got hit hard and unexpectedly (assuming 9/11 wasn't a coverup........don't start), this scared the Joint Chiefs of Staff, secretary of state, and everyone else with confidence issues and everyone else who sits at huge desks giving orders to people who sit at smaller desks. So the culmination of this is a country that won't take any chances, also has their priorities wrong *cough* IRAQ! *cough* (actually that was really just Bush and cheney), and is supposedly all-over anything that wears a rag on it's head (apologies to any Muslims here, just my laymans terms).
I have no gripes with Americans, I'm just trying to see it from a very particular part of the US Government's view, carefully ommitting anythign to do with oil etc