Absolutely, I hope most people would. And if that was all he did then that would have been great. However once you switch from "making an argument" to mocking and bullying and passive aggressive bullshit you have obviously crossed a line and lost the high ground.

Part of being an employee or contractor is accepting that often you don't have the final decision. Once you have presented all your arguments as best you can to all the relevant people you have to be prepared that they will turn around and say "I've heard your arguments and taken them into consideration, however we are still going to do it my way". And once you have reached that point you have to either accept their decision or say that as a professional you cannot accept that decision and feel you have to step away from the project.

If you want to be the one making the final call, apply for the job as the person who gets to make the final call.