Cap Jack is too volatile a personality for our team.
I agree, but I would've said the same of Marbury, who didn't cause many problems. However, it wasn't like he was with the Cs for that long. However, the "crazy" label can be positive too, look what he did to the Warriors (both good and bad!)
Furthermore, I think his contract is horrible. Given his age and track-record, I think it could be a back-breaking move to get Jack, even though he could possibly do more than Green the next season.