Are you being serious, or is that your attempt at pithy? When a person makes a threat of violence against another person or group of person that is a crime. The FBI interviewed many of the past murderers because of threats they made. Once the FBI is aware that the person is a threat they should step up monitoring that person and deny the future purchase of weapons. What's so hard to understand about that very basic concept? When the FBI has been warned and fails to act that's a big problem.

Are you suggesting that threats of violence by ragheads should go unchecked? That the only way to act is after the known subject has killed innocent people. Perhaps you're of the opinion that if we banned guns the terrorists would be put out of business.

I know that this is a difficult thing for some "big thinkers" to wrap their little brain around but the FBI should take the threats seriously rather than dismiss them out of hand preferring instead to wait for the carnage before acting.