[stands2reason]

"Unpatriotic" is like "racist"...someone may not want to have non-whites in this country or in their neighborhood, but don't call them "racist", oh, no, they're not racist, they just have preferences. In the same way, antiAmericans hate to be called "unpatriotic", but they sure don't mind acting that way.

[randog]

True. Starting an anti-American rant with, "I'm just as patriotic as the next guy, but..." is similar to saying, "Some of my best friends are black/hispanic/whatever, but...".