So there must be another explanation. I don't know what the Presidents / Prime Ministers / Intelligence Agencies of this world know, but if they all respond to current threats in the same inexplicable way, there must be some 'logical enough' underlying motivation.
Definitely pointing at a "rock and a hard place" indeed.
The other cold reality is that, for all the horror, terrorism isn't a threat to civilization, we're talking ~25k deaths/year worldwide (DoD/UN figures, cf. Wiki), which is orders of magnitude less than other threats like cancer or alcoholism or smoking tobacco (~2.5m deaths/year _each_). Terrorism is emotionally horrific, but demographically it doesn't even register. Nowadays it doesn't even really affect stock markets that much (e.g. in France, despite everything that happened in recent years). So based on the data we have as citizens, it doesn't make sense to spend so much (money, political capital, loss of freedom) to avoid so 'little' demographic/economic risk. Not saying we shouldn't fight against it, or protect citizens, but A) mass surveillance is a bad means to fight terrorism, good ol'fashionned spying is the way and B) the huge means (CIA etc.) are totally not proportional to the very risk we're trying to avoid.
So what's the _real_ reason for surveillance? What is it about Big Brother-ing citizens that is so necessary that the public does not know about? How is it even possible that after a decade and a half post 9/11 no official in any country ever talked about the _real_ reasons behind this apparent unbalance between counter-terrorist means and terrorism consequences?
I am everything but a conspiracy lunatic, so I don't accept the idea that people in power are organizing, all together, a dystopian reality a la 1984 --doesn't make sense to me.
So what gives? What are this rock and this hard place, exactly?