What’s the difference bewetten Bill Ayers and Timothy McVeigh?
For one thing, Timothy McVeigh was basically an isolated psycho, not part of a huge international movement to overthrow the American government. Another is that Timothy McVeigh didn't help launch John McCain's political career. Also, McCain didn't serve on a board with McVeigh for several years, or appear with him at various speaking events such as the following:
The Center for Public Intellectuals & The University of Illinois-Chicago (UIC)
April 19th-20th, 2002, Conference
[Participants include: William/Bill Ayers, Bernardine Dohrn, Sen Barack Obama]
"This conference is part of the Center's mission of helping to create a more engaged civil society, working towards social change, fostering coalitions between theorists and activists, and combating anti-intellectualism in contemporary culture. It will be both a celebration of ideas and a rigorous examination of the roles and responsibilities that intellectuals play in society."
http://www.uic.edu/classes/las/las400/conferencealt.htm