Of course this doesn't prove that Obama agreed with Ayers actions, but it does show that his campaign was not truthful about their relationship.

There is also a pretty convincing case to be made that it was in fact Bill Ayers who penned most, if not all, of Obama's book : "Dreams from my Father"

http://www.americanthinker.com/2009/06/breakthrough_on_the_authorship_1.html