People make mistakes, and whether it was a mistake or not.. I don't personally agree with escalating it to a level of aggression in the aspect of trying to prove something.. We cannot take back anything which has happened, all that we can do is move forward.
Remember... It's NEVER about whos right, but rather WHATS right. Don't allow others actions/thoughts/words dictate what you do say or think. Be a leader in all things.