koast,
Parker is the best defensive point guard in the league? I disagree with that statement -- Kidd, even at this point in his career, is a better defensive PG than Parker. Don't you remember what Harris did to him in the playoffs? Parker plays decent defense but that's about it -- it's just right now, there aren't a lot of PG's that are defensive stoppers in the league today -- personally, I'd take Hindrich defensively over Parker.
However, trading JO for Parker is so stupid most people wouldn't even start the thread -- much less try and defend it.