Who was in the wrong before in this situation. Me, my dad or both of us?

I had an argument with my dad just before. Basically, I was rocking back and forth sat in the armchair, which was supposedly annoying him. (I don't know why, I wasn't in the way of the TV or anything), so he told me to stop doing it. I should also mention that I have asperger's syndrome (a mild form of autism), which is why the rocking back and forth occurred - repetitive movements are one of the symptoms of autism, so stopping myself from doing it isn't as easy as some people would think.

I explained that it's down to my autism, but he wouldn't listen to me, which doesn't make sense in particular because it's believed when I got the diagnosis, my autism comes from my dad's side of the family.

It wasn't until my mum asked me to go and fill the kettle up that I stopped. As I stood up I saw that my dad was holding one of his A4 diaries up so it blocked his vision of me for some odd reason. Going to fill the kettle up stopped the argument before it became physical, but who was wrong in this situation? Me, my dad or both or us?