It's fairly easy to condense simple matters into left or right biases but easier still when the purpose is to appease our tribal nature as a species (us versus them). Of course, the latter serves political interests quite nicely and in a manner that helps keep the coffers overflowing.
That's not to say that I don't treat some matters as black or white (I do because of my own biases--and when I do, I think I'm right :) ) but it bugs me more than it probably should whenever I see this notion repeated that anyone who shares my political persuasions must, by virtue of our "patriotism," secretly desire a police state. It seems to me that the police state and the true patriot ought to be at odds with each other. Perhaps my understanding is skewed, but I can't think of a patriot who would wish for fewer freedoms, excluding for a moment Orwellian-esque double-speak like the PATRIOT Act...
The problem isn't necessarily any one political group as much as it is to do with politicians. The majority of which have been so insulated inside the echo chamber that is Washington DC and so far detached from their constituency for so long that it seems they (and any agency you can imagine that they interact with) feel separate from--and probably above--oversight.
If I were in a real conspiratorial mood, I might suggest that the divisive nature of US politics is entirely intentional and serves to keep us apart so that we may not work together to toss the bums in power out onto the street.
Sadly, though, I think I've already said enough to invite trollish remarks so I ought to stop while I'm ahead. ;)