Somewhere out there, a leftist columnist has penned an anti-American screed, happens every Fourth. Let this quote by David Mamet be my answer:
But examine our local haters of democracy, and of capitalism, the American left and their foreign comrades come a-visiting to tell us our faults. They are here not because we are the Great Satan, but because here they are free to speak. And you will note that when they write they copyright their books, and buy goods with the proceeds.