The United States is a democratic republic, which means a majority of just one makes the rules. This is one of the basic principles the Revolutionary War was fought to establish. So, since atheists are in the extreme minority they should not have the right to control the rest of the country.
There are many students who will tell you that their science teachers teach evolution as fact, and this includes college and university students. You are just one person and your experiences are not universal. Now apply this reasoning U.S. National Academy of Sciences wrote in regard to evolutionary theory "they cannot be tested by experiment". ID already has theories that are just as valid as evolutionary biology since ID is a valid interpretation of current scientifice knowledge. Evolutionary biology and ID have more in common that you are willing to admit.
Your butterfly example is microevolution, which no ID supporter denies is observable and testable. When you can show a butterfly evolving into a bird then you have strong evidence for your theory.
Now, all of your dating methods involve "c", which is a defined constant. I notice you avoided this in your response. Light speed has been defined as 299,792, 458 m/s since 1941 in spite of the fact slower speeds have been measured before and since 1941.