Having difficulty getting back on track after an interruption is part of ADHD (well, more difficulty than the average person, interruptions disrupts everybody's concentration to some degree). There is a high level of comorbidity between Autism Spectrum Disorders and ADHD-PI (formerly known as ADD).

Ok, but some people are jerks or without being autistic. No one likes being interrupted, not just autistic. They just make it while another level.

If you act angrily after being interrupted, then people will interrupt you less. People with high social skills do that intentionally for exactly that reason. The difference is in inability to control the bad reaction. Merely being rude and self centered is not enough (autistic come across like self centered, but that is oftentimes unfair).