Actually, not all of our founding fathers shared what you would call "Christian values." Jefferson, for example, was a committed Deist. He did not believe that God intervenes in the universe. He believed that God created it all and then allowed things to proceed according to natural law. If he were alive today, based on his Deist beliefs, I'd bet money that he would be a theistic evolutionist. I believe you have stated that evolution and God are contradictory, so Jefferson couldn't possibly have had anything that you would consider to be Christian values.
Your right, I shouldn't have generalized. That said, the majority believed that government should be guided by a higher power and not by man. A government that has no controls becomes corrupt so that's why the founding fathers, including Jefferson, put God in the constitution.
I never claimed that evolution is contradictory to Christian values. Don't read what is not there. What I clearly did say, and believe IMHO, is that evolution is contradictory to the Creation theory. It would certainly be contrary to common sense that those who believe in Evolution did not exercise Christian values (although sometimes a few dont). Even non-Christians try to exercise moral values.