Juries' decisions have to be respected regardless of their reasoning, which is how "jury nullification" arose. However, they are supposed to only determine matt

Juries' decisions have to be respected regardless of their reasoning, which is how "jury nullification" arose. However, they are supposed to only determine matters of fact (ie whether the defendant did something, rather than whether the law is just) and judges can deselect people who they don't trust to give an honest verdict based on fact alone. So, judges deselecting such people is actually preserving the jury system, not attacking it.