"Those who do not understand history are doomed to repeat it..."
What frightens me is witnessing the same isolationist, ignoring-brutal-facts mentality that was predominant in America during the 1930s and believing the results will be exactly the same if we continue on our current path. We were in the midst of an economic downturn and we're more concerned with a chicken in every pot and bearing weary memories of resented military engagements and we were highly resistant to meddling in world affairs.
Then, there emerged a fellow with high-sounding rhetoric centering around social justice, economic power and cultural superiority who "annexed" a territory known as Sudetenland, first by moving troops and then by signing a document decreeing the area as part of the national homeland for the "protection" of citizens who spoke the same language. Europe and the United States squalled a bit but no one raised a hand against this expansionist move. It was only months before all out war was going on in Europe.
This charismatic fellow, not being deterred by diplomatic protestations, attacked and conquered most of Europe in mere weeks and still the United States did nothing.
It is my considered opinion that we are in exactly the same position we occupied in the 1930s and we are following exactly the same path.