The things we don't know about this guy are enormous.
It's important to recognize that Michelle (and Bernadine Dorhn) may well be the key link in all this.
In 1988, Michelle went to work for Sidley & Austin. Bernadine Dohrn also worked for Sidley & Austin at this time.
In 1989, Barack interned at Sidley & Austin, where Michelle was assigned as his advisor.
In 1992, Barack and Michelle were married by Rev. Jeremiah Wright -- her pastor -- in her church, Trinity United Church of Christ.
The Michelle-Bernadine link actually precedes the Barack-Ayers link. And, after reading Michelle's graduate thesis, is there any doubt that Bernadine Dohrn's radical views wouldn't have found favor with her?