[Still Thinking]

jury nullification technically is NOT legal, in that it violates the specific instructions of the court with respect to following the applicable law.

But how can it be illegal to disregard instructions which are in themselves incorrect as well as illegal?

[Cincinnatus]

But how can it be illegal to disregard instructions which are in themselves incorrect as well as illegal?

Because jurors have no right, power or authority to determine what the law is or should be. The power of the jury is solely to determine the facts. That is ancient law.