It was pretty quickly concluded that that guy was straight out bullshitting.
The quotes are from OBL's videos that he made and leaked out to mainly Al Jazeera. They were made after all of this made happened, and OBL obviously knew to read the papers and know how to make good propaganda.
Actually those quotes reflect the same sentiments that I recall were expressed in an interview with OBL that either Time or Newsweek published prior to 9/11. I wish I could find a definite pointer to that issue, to check my recollection.
As a rule, most of history's bad actors -- Hitler, Lenin, bin Laden, G. W. Bush (via PNAC), and others -- have telegraphed exactly what they intend to do, years beforehand. Is it really their fault when nobody cares?
Not exactly: http://www.reddit.com/r/WTF/comments/wcpls/this_i_my_friends...