Oh, really?
I would say his actions at the end of A Taste of Armageddon were wrong. He had freed the landing party and the Enterprise was no longer in danger yet he chose to destroy the Eminians war computers anyway.
He had a right to save his people, once that was accomplished any further action was just him forcing his moral viewpoint on the Eminians.
I felt at the very least he should have explained his plan to the Eminians and tried to reason with them instead of taking the gamble he did.
For some reason though, Kirk doesn't annoy me so much when he's heavy-handed like this compared to say, Picard or Janeway.
But wasn't the landing party unable to return to the ship, because the Eminians were trying to fire disruptors and forced the Enterprise to be out of range and keep her shields up?