Religion may be outdated, but its principles and teachings contributed to forming modern society. We don't generally accept murder and other crimes as societal norms, and mainly because of old religious dictums that have endured through time.
Do you really think most primitive tribes approved of murder until a god revealed himself to them and said: "Stop killing one another. Go kill the other tribe instead!"? Not likely. As different as religions are, they all have some basic principles in common, and those are the precepts which predate religion. As for other crimes, every religion has invented some - that is, made certain quite normal and harmless activities illegal, which the priests explain only as "an abomination" or "unclean". I doubt it would do society any harm to go with a rational process of law-making.