You take insults too literally, an insult is an insult the whole idea is that its meant to degrade, belittle and rankle you unless the insult is said in mock which doesn't translate so well over the internet.
Its like when the 4Chan users label everyone and everything with fag. The internet uses label constantly upon other people for a variation of reasons. However aspergers and autism is used is because it will offend people who take it too seriously as is it purpose and the other being that Autistic and aspergers tend to have social abnormally tied to them that are innately bad traits such as overly invasive attitudes, approaching people with a manner that can appear arrogant, cock sure, overly self important like that of a stars trek dork who rants on to anyone near him about the trivial details of some random episode cameo star ship, convinced that this information is something to be proud of and that hes enlightening peoples lives.
Another factoid of people with autism is that a lot of them end up taking things in a friendly social context too seriously....like right now and this is generally annoying and easy to exploit, it make them seem foolish and gullible even if the person does show signs of actually being very smart and clever in other fields.
The main reason being though that the insult is utilized because most examples of aspergers and autism in the public eye are not that good, they tend to be obscure Savants or physically decayed or over encumbered man children. The normal guys, the people who just trot along and do their best, the talented writer/ physicist/ mathematician and so on who can actually engage in social events are fine don't get noticed because their autism is well hidden and managed, they are effectively to the crowds and out side observes just like normal people, so they don't get taken into account when you apply the autism label.
Aspergers is also a good bail out card for the lazy or the socially creepy or just out right rude. A lot of people who are given a disorder label of any sort enter this mind set of them being just "that way" because I got this affliction and I can't break down these barriers of my social issues.
Don't let it get to you. You got to look at these insults and arguments on the internet in a broad, analytical way. Just label it as a character assassination ad-hominem attack designed to rankle you and forget its meaning, you shouldn't bother yourself with such lowly methods of conversation anyway or debating.
You can't hold the internet to any standard of talking, thats against its design and nature but you can set a standard for what you, yourself react and reply too and if such a thing appears lowly or even ignorant then don't waste your time and lower yourself by giving it the attention.
I have aspergers. No. I am not projecting myself onto others before any butthurt people try to bring that up.
I also don't like Team Fortress, at all.