It turns out that Charles Blow’s column about hate speech in yesterday’s New York Times was very timely

"Suspect in officers' shooting was into conspiracy theories
Sunday, April 05, 2009
By Dennis B. Roddy, Pittsburgh Post-Gazette
Richard Andrew Poplawski was a young man convinced the nation was secretly controlled by a cabal that would eradicate freedom of speech, take away his guns and use the military to enslave the citizenry."
More at:
http://www.post-gazette.com/pg/09095/960750-53.stm

Keep in mind that although it may not seem so Chester County, Pennsylvania is a major hot spot for extremist activity. It only takes one insane extremist screwball with an AK-47 or bomb to kill a lot of people.