FFFlyer, the rationing of freedom is the goal of terrorists everywhere. All of the preboarding nonsense is precisely what they want. They hate us because we have created a good life for ourselves, one that includes the freedom to go anywhere they with. Such a life is impossible in their homelands (thanks to their leaders), so they try to "equalize" things by making us as miserable as they are. They cannot build, so they figure destroying is the next best thing.
As for profiling, it's just good sense. Here in Toronto there are many muslims who've mentioned that their imams are calling press conferences in English to condemn terrorism, then taking to their pulpits every Friday to call for jihad. Many mosques in North America have been engaging in fundraising for terrorist groups, usually without the knowledge of their members. It doesn't help when they hide their activities behind the government's policy of multiculturalism; just one week after it was revealed that a government-sponsored cummunity group was buying arms for the Tamil Tigers, a federal cabinet minister was the guest speaker at one of their fundraising dinners.