In short, I'm saying that I don't think Bram should get (or would be right to expect) a pass for being an asshole to a volunteer on FreeNode, regardless of whether he has Asperger's or not. Being an asshole isn't OK, even if you have a condition that makes it easier to be one without noticing. It just means you need to be more mindful of your behavior, since it's no one else's job to do it for you.
I know Bram and I don't think he would care if I said that face to face communication is not a problem for him. In my time speaking with Bram both face to face and online, his primary characteristic per Asperger's has been a near complete lack of social fear.
Most humans get nervous in certain social situations. Bram does not. This will certainly cause problems when faced with someone that social might wield power, as an administrator, and Bram my have to pay for his lack of decorum in these situations.
I'm not excusing Bram's behavior. There is no need to excuse it. It has happened and he will pay whatever price is exacted. I'm simply explaining it.