I do not know for a fact that he is. I just noticed that the way he communicates suggests PERHAPS he is.
Many people who have high functioning autism have obsessive special interests, and are indeed experts (though NOT infallible, in their area of interest.)
I don’t excuse mean spirited behavior for anyone.
But mean spirited is different that stating that you are correct and someone else is wrong. This is often the case with anyone who assumes that they know EVERYTHING about a certain subject.
I don’t use my autism as an excuse to annoy people or “get away with poor social behaviors.”
I tell people because I am literally incapable of knowing at times what questions or comments are appropriate.
Some examples:
1. A random stranger asks me, “How much money do you make?” I’ll tell them exactly how much, because to me, it’s like saying I’m 5’11. Why wouldn’t I tell them.
2. The cliched question from my wife, “Do you like my outfit?” I’ll respond with EXACTLY what I think, “Yes. It accentuates your figure,” or “No. that color against your skin looks weird.”
3. Someone asks me, “Are low carb diets a fad?” I’ll reply, “No. though they have become mainstream ideas, initially ketogenic diets were designed to treat epilepsy in children.”
4. Someone asks me, “What do you think of the show 3 1/2 Men?” I’ll say, “a show which depicts a loveable woman-hopping alcoholic with few redeeming features and questionable comedic writing is a poor use of time to watch.”
(No offense to loveable alcoholics and men who enjoy frequent sexual experiences with many women.)
It took my wife training me social skills over DECADES to realize that my comments aren’t always socially acceptable and could be offensive to people.
If the forum poster I referenced has no one to teach them tact and social skills, AND is autistic, then I’m only offering an explanation about those behaviors, not “giving them a pass.”
Having autism is not a “say whatever you want free of criticism card”; it is in fact a life long struggle for many.
Well, that’s my two cents.
I’m fine if you disagree.
:)
I know this space is always full of strong reactions so I get really every direction of this conversation. 
