Interesting point. But didn't Socrates make conclusions about the nature of ethics, which we know can only come from God? His ethics seemed to just hang in mid-air as he never did realize that moral absolutes from directly from the character and person of the living God.
Why blame him for what he critized others for? Here's a guy that tried to show how people's ethics are hung in mid-air and then for that we join the Athenians and make him drink hemlock for another 2500 years?