Why do Christians swear oaths to God or on the Bible when Jesus tells them not to do so?

were idiots? But things are changing, they don't use the bibles anymore, even the Pres, I bet you cannot find any picture of him saluting the flag or putting his right hand on his heart when they say the pledge of allegience. Is there something terribly wrong with this picture? He will either use his left hand or, well look at some pictures, you will see the or.