I run into opinions of this nature a lot. Mostly I think, probably you are young and lack a knowledgable foundation of historical context... power struggles/religion/politics... caste systems, slavery and pecking orders.

There is a lot to know, a lot to research in regard to history and why people believe the things they do. More often than not you'll find they believe certain things only because of the position they were born into within their family and culture. Essentially, it's all they know and that applies as equally to America in 2007 as it has to any other culture past or present.

Human secularism, which proposes essentially that man is god of this world, and likewise which movement has worked very hard to promote evolution, was actually begun as a church in the early 1900's. In order to be as influential as possible though, eg; public school curriculim, the human secularist movement had to renounce it's roots as a religion of man/self worship as opposed to God worship. But it is still the same movement.