One thing I have learned is you always say "Can I get that in writing?". This alone stops a huge number of stupid decisions, especially when you're protesting.
That worked on one of my tasks where I was asked to do something counter to standards. After I tried to argue them down for some time, my coworker (I wish I could take credit but I've made use of this since then) simply asked for them to send us an e-mail stating what we were being asked to do. At that point, the other person's manager told him to stop asking us to do it the wrong way.
He split his forces and decided to go south to capture oil fields.
My understanding is this is the main reason for the war expanding to two fronts. Hitler being a dolt not withstanding, if Germany had stayed out of Russia they might have had serious trouble holding Europe without good sources of oil.
Whoever dies with the most toys wins.