I disagree that the term UnAmerican should be used at all. START opposition is a form of Republican greed, power hungry appropriation, callous disregard for authentic American security, rooted in Wall Street corruption, military malfeasance and general craziness.
There is no reasonable excuse for this opposition except power moves.

The true American patriots are people like Julian Assange, Micheal Moore, Cindy Sheehan, Jeremy Scahill, Naomi Klein, Code Pink and those who have spoken out against the imperialist designs of an out-of-control government controlled by corporations.