What is this fundie saying? Is he really saying this?
"The USA won the vietnam war, but we withdraw from vietnam because of our dovish foreign policy"
Speaking as a german, I can tell you: Self-delusions like these are NO good idea. This fundies' argument reminds me very much of something that happened here after WW1.
We started the first World War out of sheer stupidity and delusions of grandeur. We lost this war utterly and completely. Both are historical facts.
After the armistrice, the ultra-right conservatives started to spread a very dangerous lie: That the glorious german army was undefeated and could have won the war easily. "But the treacherous dovish liberals stabbed them in the back".
Read a little bit how german history developed after WW1, and why Germany fell for even worse ultra-right madness. This self-delusionary lie ("we lost the war only because of the left-wing liberals") was one important factor in this very bad development.
Not recognizing one's limitations, closing ones eyes to reality, and insisting on "We are exceptional! We are the greatest!" can become very, very dangerous.
We Germans have been there, done that. Believe me: Maintaining a national self-delusion is NOT a good idea.