We should never sacrifice liberty for "the common good," so isn't the current "emergency" a perfect time for us to teach that lesson?
Yes. But is that what we have been doing as a society? As in, obviously some people have been, but I think it's not all that much of a stretch to say that people in the West (Americans to a lesser extent than Europeans) had lost some of their freedom.
Furthermore, it is not
possible to eradicate terrorism, just like it isn't possible to eradicate murder. Of course, this does not mean the police should not prosecute murderers, but imagine we declared an 'emergency' until all murder is eradicated. Wouldn't this emergency last forever?
I don't know who's been telling you that. At least in America, the tough-on-terror politicians tend to be more liberty-minded.
As compared to whom? To Hillary Clinton? Of course.
But within the movement itself, less 'tough-on-terror' people such as paleoconservatives and libertarians, had been marginalized on this basis. As far as I understand its, guys like Pat Buchanan have been driven entirely out because they could not provide a 'solution' to terrorism.
I have read in several sources – and now, I cannot back this up, and I will happily admit being wrong – that before 9/11, Bush and his team were planning to focus on spending cuts throughout the Presidency, and that after 9/11 they had been forced to change this policy, in part to preserve their political capital for the task of backing up the invasions of Iraq and Afghanistan. I don't know if it is true, but it seems tragic to me that a giant opportunity to continue what Reagan had started had been wasted. And at least in part (with Iraq) it's still not clear whether that was a good idea to even do that.
Now, I am not a great fan of the Islamo-idiot faction – I can't really be a fan of people who shelled my town and murdered a woman four blocks away from me, can I? - but I just don't think they're such a huge global existential threat they're made out to be.
I have an aversion to the way that news media take a ghastly and terrible event – Columbine, 9/11, a child-kidnapping or some other ghastly atrocity – and make it out as if 'the world has now changed' and 'the old concepts' no longer apply. Obviously, I am not a friend of the violent butt-head du jour, but it does not mean every time something bad happens we must stand on our heads and rewrite society all over.
We already have ways to deal with people like this. We have police and the military and the courts, ad of course we have armed citizens. This doesn't mean we should pile on more paramilitary cops with heavier and heavier gear, or start wand-probing more citizens, or putting cameras on every street corner – as people had already done in a variety of countries (bear in mind I'm not just talking about America here).