Terrorists are people who use death to create terror in people. For example, muslim extremists blow up Jewish civilians to create a climate of terror in the Israeli populace, while the Israeli levels neighborhoods with missiles to do the same. These are acts of terrorism. Terrorists use our natural fear of death to terrorize us.
Bill Ayers, however, never killed anyone. He was a true American fighting against a government fighting a war he thought unjust, the Vietnam War. He bombed the outside of the Pentagon and an anti-unionist statue twice, killing no one. Once police were posted to guard the statue, he didn't bomb them. A terrorist would have. Therefore, the only labels that can be applied to him are "revolutionary" and "vandal", NOT terrorist.
http://billayers.wordpress.com/