Um... without wishing to pour cold water on anyone, the cabincrew forum is, like Pprune, populated by posts from individuals operating under pseudonyms. There is absolutely nothing to say that the individual who clearly lost it in spades on the thread in question was Mr Holley, although various members on that forum seem to have suggested otherwise. It is pure speculation.
That said, the outburst by the individual in question was completely out of order. Had it taken place on Pprune I feel certain that the mods would not only have pulled the posts, but also pulled the plug on the id that posted them. Clearly the OP in the thread touched a very raw nerve for someone. Given the anonymity of forums I did wonder if the individual who went into such a public tirade of abuse might have been closely related to the people in the article.