While I am sympathetic to the voluntaryist ideology, I just don't think rational debate is possible.
Hence, "Politics is the mindkiller".
I think you're taking the Less Wrong article a little too literally, and in fact it seems to me that you are committing the same error of which it is warning. Your Blue/Green position is that rational debate is impossible. So you jump into otherwise somewhat rational debates and state that rational debate is not possible. Why not just go read something else instead?
If you truly think rational debate is impossible, you shouldn't be attempting to convince us so.