Just a brief observation, but why do some PM’s try to score points off each other. There seems to be a breed of managers that try to create a situation, dissent for the hell of it purely because they can?
Wrong, bad, go to the naughty step; hate that, hate hate hate.
My job is to deliver the project, successfully, not win a p*ssing contest with the supplier/customer/partner PM. I’ll not compromise my employers position, but my first and foremost is to deliver a profitable project, with a happy customer and partners who want to work with us again.
It should be yours also.