"Maybe that qualifies [him] as working in the domain of a professional, yes?"
Either you think he is a professional, or you do not. You appear to be holding up a standard, claiming that you believe he fits the criteria needed to be judged by it, and then lambasting him for not living up to the standard you have set.
Overall, I find this somewhat confusing, but possibly I dont have sufficient context to judge.
TBH Im not particularly motivated to 'stand up' for the behavior of anyone I dont know.
I am interested in what makes you so interested in casting judgment on Zed, as opposed to on yourself?
Whatever puerile, irrational and paranoid responses Zed may have produced, you seem to be matching them with a self admitted hypocrisy, a large amount of self righteous vitriol and a bewildering statement of tribal affiliation to an anonymous internet discussion forum that apparently requires your outraged protection lest it collapses completely under the weight of a misunderstanding between Zed and another participant.
Zed has, to my knowledge, done you no harm of any kind. He certainly represents absolutely no realistic threat to HN.
why do you feel justified abusing him in this fashion?