I read most before they were deleted. Still can't remember any of them directly insulting the CTO at all. I can see how you can interpret "you don't understand" that way but I'm willing to give him the benefit of the doubt. Text is a horrible means of communication as it removes any tone to the words and allows it to be interpreted how ever the reader so pleases.
Here is a link to the comments [1] from the OP. Don't see a single one from the CEO that I would interpret as insulting. There are however countless others from 3rd party posters that were way more easily interpretable as hostile in nature.
I may have jumped the gun a bit. Although I still think coming on here when the CTO isn't able to defend themselves is a little like trying to get people to do mobjustice in a way.