A lengthy FP Blog article 'Patriot Games' and better explained by the sub-title:
How the FBI spent a decade hunting white supremacists and missed Timothy McVeigh.
Yesterday being the seventeenth anniversary of the Oklahoma City mass murder.

Link:http://www.foreignpolicy.com/article...ames?page=full

The article ends with:
There are obviously fundamental differences between targeting the radical fringe Patriot movement and targeting the mainstream Muslim community. Targeting all Muslims for infiltration is akin to targeting all white Americans to gain intelligence on supremacists. And the social consequences of fomenting paranoia and mistrust of government in overwhelmingly law-abiding communities are different than within a movement that fundamentally presumes government malfeasance....

The issue of how the government uses infiltration will continue to be hotly debated. By looking at the lessons of the past, we can start to craft the right questions for the future.