David Heinemeier-Hansson wasn't the "original committer to Rails". He built the first version of Rails entirely on his own. As he's known to be quite opinionated and harsh in his tone, I read the "melt down" that was mentioned here and I really don't think it reads in that tone at all[2]. While I did find the article here quite interesting and do share some of the sentiment regarding tech conferences, I find this paragraph quite disingenuous.
[1] Misspelling by author
It is a shame that many people who claim to support diversity and tolerance actually have no interest in it.