Well I do too, but there have been serious attacks on open society from several directions for quite some time now, and not only in America. That scares me since I dont believe that there is any society that, under any circumstance, cant revert to full blown totalitarianism
As a worst-case example, that will put the fear of god into any but the most unimaginative student, I recommend reading Ordinary men by Christopher Browning. Browning shows, with frightening clarity, what ordinary men, with ordinary nature, are capable of doing and rationalize to both themselves as well as others.