You think terrorists drove us mad with fear, try actually reading some of the history of the 20th century and imagine what we would have done, in an era before our modern feeling of entitlement to privacy and to open dissent, when our enemy was vast, spectacularly well-armed, beat us into space, and had nuclear missiles pointed in our face.
The compass points towards liberty, but sometimes we walk east, or west, or, during the Kennedy and Nixon and Reagan administrations, fucking south.
There is an interesting interview with him at http://depts.washington.edu/labhist/cpproject/caughlan_inter...
It is worth noting that our strong protections of open dissent were specifically created by the court in response to very dramatic overreaches by the government.
The notion that protesters ended the Vietnam war is also ahistorical, a fiction designed to flatter the boomers.
I'm responding to the "Eventually" you wrote. When you're digging yourself a grave, the sooner you put down your shovel and get out of the hole, the better.
I live in LA and personally know families who spent time in those camps. I also know screenwriting families who lost their jobs during the 1950s Hollywood blacklist. So yes, those mistakes were real, and they can divert the course of lives for the worse.
In the flawed world we live in, it takes time for people to change their minds and muster the political will to roll them back. This is generally prompted by over-reach. For example, as the cold war started to cool off a bit, the Church Committee (http://en.wikipedia.org/wiki/Church_Committee) and the Pike Committee (http://en.wikipedia.org/wiki/Pike_Committee). Maybe we're seeing such a time now.