You are still missing the point. The jumpseat is not owned by the union nor by you. You can deny anybody the jumpseat same as I can, but that doesn't mean you should. You can make up whatever justification you want for your childish, unprofessional behavior.
But it will be other pilots at your company whose commute is affected when you lose a reciprocal jumpseat agreement, or when the company decides to ban everyone except management pilots and government personelle from the flightdeck. Like I said before, there is nothing professional about your behavior, it is just the kind of nonsense that makes us all look like fools, and keeps upper management very happy because so long as we are fighting other pilots we are not focusing on what they are doing to us.