The quote below is from President George W. Bush’s address to a Joint Session of Congress on September 20, 2001.

Either you are with us, or you are with the terrorists. From this day forward, any nation that continues to harbor or support terrorism will be regarded by the United States as… hostile…
Source: President George W. Bush, Joint Session of Congress, on September 20, 2001.

Which purpose of government could be used to justify this position?