Islamic fundamentalism is definitely of a different character than other threats to U.S. Sovereignty. This is the first large group of persons who is willing to commit suicide for its cause. It's actually rather weird, when you think about it.
Muslims of this ilk seem to believe that this sort of activity will result in the eventual domination of the West, or at least that the West will leave Islam to its own devices.
It's just not gonna happen that way. There isn't enough time for Islamic fundamentalism to take root in the USA in any substantial numbers. I suggest that the next really big terrorist action against a U.S. target will be the last one, mainly because I'm a pretty ordinary guy, with no particular axe to grind against the Arab world, yet I'm getting tired of the inconvenience of worrying about what's on the horizon.
So, I suspect are many other ordinary Americans. And, if enough of us get annoyed, the politicians will start to feel safe with the idea of something a little more aggressive than what we've done militarily up till now.
It only takes just one Ohio-class submarine to put an end to the entire Islamic movement. I really don't think that they understand how great the threat is, and how easily things could escalate to that point.
I feel very sad to say it, but I think Islam is doomed within the next decade. We may all be doomed after that, but Islam is definitely on the way to being first on the "hit" parade.