How does the World get better?

The problem with your examples is that the overwhelming majority doesn't care and the Ten Commandments are good moral guidelines for everyone. Simply b/c you hold a different viewpoint than I do doesn't mean that your belief is better than mine (in fact I would say it is faulty b/c you have no moral base to make laws on). Swearing in a president with the Bible is a tradition. Christianity is not promoted b/c that is as you said it is a tradition and Christians live by faith not tradition. Oh, and as this is a free country the president can make his own choice.