What's your take on this, "GunHugger"? In their own minds, were the terrorists not "Freedom Fighters" -- out on a mission against the "Great Satan" of the United States?School Teaches 9-11 Hijackers Were Freedom Fighters...
It would take quite an important mission and a lot of dedication for me to have the will to fly an aircraft into a building.(On occasion, US fighter pilots, out of ammunition, have rammed enemy bombers to take them down. Soviet pilots were taught to do this against US bombers.)
I see no problem in teaching children about the hijackers being "Freedom Fighters" because they were in fact willing to kill themselves for a cause. Are there any causes for which you would sacrifice your life? The discussion, and lessons from the discussion, are important.
Being taught about communism, or Nazism, does not make you a communist, or a Nazi. It teaches you about basic human concepts, ideals, and values -- and how we relate within the world community.