From my understanding, the premise of revolutionary defeatism involves supporting the defeat of your own bourgeois government. I am an American. I am perfectly fine with that when it comes to things like US military actions in the Middle East. However, there has been one enemy the United States has had that is definitely quite different, Nazi Germany. It's pretty much universally believed among the left that Nazi Germany was bad and should never be supported (and that's for a GOOD reason).
But how does revolutionary defeatism square in with something like that?
facts. Marxism is a method of analysis and planning first and a doctrine second.