You're correct. The Postmodern idea that the west has risen to greatness because of racism and that the success of the west is due to the exploitation of other races is absurd. It is well known that the rise to dominance of the west and specifically in the US was due to a free market system and classical liberalism. I find it hilarious when people seem to believe that the only group that has been racists throughout history was white people. Indians, Persians, Africans and Chinese people all engaged in slavery as well, and the idea that the west was the sole racists in the world is absurd.
The other comment that someone posted here talks about being "White" as a philosophy. That is an extremely racists comment and should not be tolerated, seeing as it borders on hate speech.