I hadn't seen this when it happened and I'm not going to watch it now.
Special needs people get mocked all the time. I'd like to feel we've come some way since this specific event would have happened on that score, and I do believe there have been improvements over time in understanding rather than jeering at people who deviate from the norm. I do see some evidence of that, at least in my children's schools, to give an example. In the 70s we "weirdos" (there were very very few of us, though) were literally beaten up and our lives made miserable by other children. Adults looked the other way or if they acknowledged the ongoing torture, said that "this is how kids learn" how to "fit in" and that when we "got tired of" the abuse (they never called it abuse) we'd "finally shape up." At least most schools that I know of don't engage in that sort of mindset any more. That's progress.
But no matter how far we come, there will always be a certain percentage of *ssholes in the population.