Ayers and the Weather Underground enumerated dozens of different grievances as the rationales for their bombings their overarching goal being to inspire a violent mass uprising against the United States government in order to establish a communist dictatorship of the proletariat, in Ayers own words.
http://www.zombietime.com/prairie_fire/
This past weekend it was discovered that Barack Obama, terrorist Bill Ayers and Maoist hardliner Mike Klonsky worked together in the same office building on the same floor for several years.
http://gatewaypundit.blogspot.com/2008/10/of-course-maoist-hardliner-ayers.html