> who and what are behind the push to remove civil libertiesThere's no master plan, if that's what you're getting at. I think this general drift is the result of a few different things, most of which are older than we'd like to admit:
• A lot of people like authoritarianism
• People blame government by default for any problem that doesn't have any more obvious perpetrator (see point 1)
• The massive mismatch in military strength between western powers and elsewhere that results in oppression of weaker nations and resultant terrorism
In case you doubt the appeal of authoritarianism just go look at the popularity of Stalin in Russia, or the readership of the Daily Mail in the UK, or the overwhelming political support for the NSA / the PATRIOT Act. Lots and lots of people want to live in a highly authoritarian society and it's worth reflecting on why that is, and whether those people have valid reasons.
I was recently in a former communist country, and took a tour of one of the cities. The tour guide mentioned that a lot of older people weren't so sure that democracy/capitalism is better than communism. Sure, in the communist era people got executed for merely making rude comments or jokes about political leaders, but at least there was working social security, pensions, everyone had a job etc. Whereas post-USSR, often life got harder and the old certainties dissolved.
Authoritarianism is popular because it presents people with a simple deal: support the regime no matter how shitty it gets and in return the government will take care of you - and as long as they have absolute power, if something bad happens to you then it's the government's fault. That government tends to have simple, easily understood solutions for things that appeal to people's animal instincts, like picking someone to blame for something and then executing them. Additionally you will get a comforting story about how by simply being born in this society you are one of the good guys, as opposed to "them" who are the bad guys. All you have to do is not have strong opinions, not be weird, or gay, or a Jew, and fit in with whatever other random biases the leaders have and life will be, if not good, then at least straightforward. And how hard is that, really? Almost by definition most people find it easy to meet that criteria, because they're in the majority.
Contrast with the civil libertarian utopia: if something bad happens to you, it's probably your own fault. You have nobody to blame but yourself. It's not clear what you're supposed to do or how to be a success in life. The government is small and generally refuses blame for things, even if the population is under attack. There is no black/white good vs evil story to hold on to. All around you are people who aren't like you, who don't think like you.
That's just my guess. I would really like to read a well thought out book on the appeal of authoritarianism. I feel like it's an underexplored topic (at least in the modern era).