I'm not sure what you're implying. How have the religious roots of America aligned with protecting unalienable human rights? Is this not counting all that slavery, genocide, war, and intolerance? Was the state fearing to tread somewhere when they built biological and atomic weapons or practiced torture in the 21st century?
If anything, the understanding of human rights and the legal protection afforded to ALL people has grown as the nation and the world have become more secular. So are we talking about the history or violence and exploitation that has always been part of human society or are we talking about the expansion of the size and scope of the federal government and how it effects white guys with money?