But when it comes to the actual meat of the religion, prophets and priests follow the ancient human practice of making everything up as they go along. And they make up one rule for women under twelve, another rule for men over thirteen; one rule for the Sabbath and another rule for weekdays; one rule for science and another rule for sorcery...

???

I thought those rules were the outcome of competition between different factions. The factions with the better rules were more likely to win. For example, a century or two ago, part of the Jewish community decided to try ignoring the requirement to not eat shrimp etc. It looks like that isn't working very well. As far as Jews are concerned, God really does hate shrimp.