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I'm calming myself. Oooohmm.
Under what provocation, or to acheive what end, will we fight wars? To what extent are you prepared to sacrifice what you have so that others may live? And what are the principles of progressivism? Again, what are the principles of progressivism. At what point does progressivism draw a line and say: "You may not pass!"
I don't speak for "progressives" as such. But you already know that. I can only tell you what I believe. I don't believe war, in any conventional sense regarding terrorism, will bring us (and, lo, millions of others) anything but misery. Law enforcement--and all that entails--regarding the likes of al Qaeda is the preferred approach.
As for "You may not pass!" I defer to the universal idea of decency. That means, whether it involves torture, rendition, gay marriage (or any other civil right, here, in the US), these are the things that must be in accordance with our own Constitution and international laws/treaties that we've subscribed to (and if we haven't yet, then we should).
I'm certain I haven't covered all bases to your satifaction, but perhaps you'll give me a little leeway on that. Because they aren't mentioned doesn't mean they aren't important.