I don't think it is. As you say, there is probably not a lot there. However, there probably are some anti-Israeli remarks made and most likely Obama sat through them with an approving expression on his face. Also, toasting a person with a link to the PLO would not be good for his "Ayers is just a guy in the neighborhood" theme.
Who knows? It may exist, but there’s no reason to believe this lady’s guess who supplied the tape.
Any way, I got a theory about why McCain didn’t run directly on Obama and Chicago sleaze — it was a compromise so Obama wouldn’t run on Keating Five and other sleaze.
After he beat HIllary Obama openly said Keating 5 was fair game.