I agree with nuconvert's response. At the start of WWII, FDR said that the only thing we have to fear is fear itself. Organized terror hasn't changed a lot in 70 years; it's just being harnessed in new ways. It's all the same thing. If you feel irrational fear, the extremists can declare a temporary victory over you on the spot.
We won WWII by reacting intelligently to fear. Right now I'm more worried about our own disunity than anything else. Think about that for a minute!
The "fear" speech was his First Inuageral Address. In 1933. He was talking about the Depression NOT our later enemies of WW-2