Name another possible source for morals other than God or man. You can't do it - there are no other possibilities. ET perhaps? So, by logic, you are confined to one or the other. Which is it?
This statement is laughable. The so-called "scientists" of 500 years ago were the ignorant ones! They used to "bleed" people as a medical treatment for disease, and they believed in "phlogiston," and an earth-centered universe. It was Christians/theists who made the biggest scientific breakthroughs in history - Kepler, Copernicus, Newton, Galileo, Pasteur. Furthermore, the ancient jews had built-in protections against germs. How did they know? Read the bible - God told Moses that the hebrews were not to drink blood or touch a dead animal - why do you suppose that was? How did Moses know that blood and dead animals carry bacteria and disease? The jews also had hygienic practices. During the Black Death of the 1300s, Jews were relatively unschathed by the plague - why? Because they were clean so the disease-carrying rats didn't hang out in their neighborhood as they did others. As a result, many blamed the jews for plague. Who was more ignorant? Care to do some study and rethink before making any more "ignorant" statements?