Well, it's the truth. You can't fight an idea with bullets. Communism is a perfect example. Naziism is a perfect example. Satanism is a perfect example. People still practice witchcraft today, and a few hundred years ago we were burning those people alive. You can't pysically remove an idea from the consciousness of the human race, it will always be there.
We're not fighting terrorism, we're just murdering people.