Unsure why this is a reply to the OP, the only thing common is RMS and nothing else.
But, RMS is known to be socially awkward, the same goes for many autistic individuals. It's just that he doesn't mask and comes out as “rude”. If send an e-mail, he will usually take his time to write down a succinct response.
I know a few autistic people including one of my nephews. They are different in some ways particularly when they are very young and are still struggling with expressing their emotions. But none of them are arrogant and disrespectful. I think you can be autistic and also a jerk, one doesn’t justify the other.