You do know that both the defense and the prosecution get to question potential jurors and to strike an equal amount of potential jurors during voir dire, don't you? How is this "stacking the jury for the state?"
Premise: It is a right of the people - the jury - to judge the law as well as the fact.
The State asks me how I feel about the law, then dismisses me because I dislike the law. This dismissal is not one of the State's peremptory challenges.
If the juror has the right to judge the law, but then the juror may be removed for the sole reason that he may judge the law unfavorably to the State, it's the State stacking the jury.