I would agree that psychology plays of big part of everything in life.
Yes, it feels good to support your country through thick and thin. However, it takes more courage to own up to our country’s mistake and try to fix it. We don’t do everything right and Iraq is one big mistake. Staying the course will not fix that mistake.
Sometimes the best course of action is to cut the losses and move on. That’s not quitting but it’s doing the right thing (whether in personal life, business, or in politics).