I think it's a useful analogy and there is no need for offense unless the analogy is with "the flying spaghetti monster". Why take offense to any analogy? Those taking offense wouldn't be less offended by any other analogy. They think that nothing is a serious as what they belief in. Talk about arrogance. As I mentioned above somewhere, there was a quote attributed to Gandhi, "I like your Christ. I don't like your Christians. They are not like Christ".