I am not sure either that my usage is the correct one - it may only come from erroneous equation with a similar term in Hungarian. But maybe on US blogs, "right-winger" can be such a curse-word due to the general dualist polarization of politics - even in the case of centrists: for them, "leftist" and "right-winger" are two 'extremes' equally bad, there is no PFL-VVD-Christ Democrats-D66-Labour-Greens-Socialists spectrum to consider.

(Hallo hello Americans lurking out there: can you resolve this issue for us? :-) )

_{*Lunatic*, n.
One whose delusions are out of fashion.}