Unfortunately, there is no way to completely remove the politics from the Volt- or any other car that involves "green" technology and subsidies. I ran into the same issue when trying to have an intelligent discussion on the Motor Trend site.
It's a shame in some ways, but the Volt is just not "any old car". It is a paradigm shift and it touches many sensitive issues.
The Politics are just as real and just as hard to ignore as the smirks I get from some people when simply driving past them in my car.
But the "Birther" thing? Give me a break. That has no place here.
2012 Chevy Volt #4471
Cyber Gray Metallic
Back-Up Camera/Proximity Sensors
Driver has big smile on face most of the time