When the enemy leader lets you go after you tell him how you needed his help and hoped he'd do your job for you so badly that you spared him and threw the fight, then rely on his good will to free you after you refuse to be freed by your allies from the faction you claim to represent, you are not joining with that person. Come on, even you don't really believe that, you're just making this sad sell to try and salvage Saurfang for the consumption of Horde posters.