You just have to know where to look. I don't think that it is a matter of copyright laws that is keeping matters of history out of the mainstream, I think it is because the history of the conservative movement in America would horrify most Americans if they knew the truth. While we had American facists before WWII, they really became an integral part of society during the Cold War. Project Paperclip, among others actively recruited former Nazis into high governmental positions. And the fact of the matter is that Hitler would have never risen to power without the backing of several prominent Americans, Henry Ford and Prescott Bush among them.
If you want to learn this sort of history, you have to go outside the mainstream press. I would suggest this book,<
http://www.guilford.com/cgi-bin/cartscript.cgi?page=politics/berlet.htm&cart_id=> Right Wing Populism in America. A great place to start. I'm sure if you went to your local alternative bookstore you could find many more.