In the 1960s and 70s the prevailing opinion was that a politics love and peace would form a new world order, that in the post-war era, McCarthyism was just a blip. "All you need is love," The Beatles sang. It was believed that the enduring words of Franklin D. Roosevelt, "all we have to fear is fear itself," would pass into irrelevant redundancy. That hasn't quite happened.
Fear has become the trendy political capitol for modern politicians to exploit, but to cash in on this currency there needs to be an enemy.