The point is that the rails community is more childish and immature than other communities; the author explicitly calls out django as an example of a community that is less immature.

Could you explain what your counterpoint is, is it just that people used to be immature too? Obviously there have been immature people throughout history, and obviously there is going to be immature people in any community. Historical immaturity is totally irrelevant here, we don't get to choose between a community in 2006 and a community today, we only get to choose between community A today and community B today. If A is a weaker community today than B is today then why join it?