This article has no relevance to gender-neutral language and no one other than yourself is discussing this. It would be better to address this issue in a relevant thread instead of hijacking a random one.
Specifically the casual use of the word 'insane'. I don't think it's unreasonable to discuss the contents of the page and make references to things not contained on the page.
I think you're thinking of the word "retarded". You might as well be arguing against using the word "crazy". Insane and crazy have identical meaning in most contexts.