To be fair, there are very few people who claim that our society and laws should be based around the life and teachings of Claudius, so it's understandable that the realities surrounding the existence of Jesus (or Mohammed, or any other religious figure, for that matter) is subject to greater scrutiny than that of a mere historical figure, given that people are still keen on shoving his supposed teachings down everyone's throat and ultimately making all of us subject to them in terms of social rules and laws.