He should not have been qualified. Period. He simply should not have been in the pool.
It's not a conspiracy and I think the Libby team figured that they'd just take one moonbat and hope for a hung jury.
You can rant all you want about the way you think the system should work if you were making the rules. But under the rules that exist in Federal court, this guy was on the jury because the defense let him be on the jury. End of story.