The assumption here - "autistic people are arseholes" - is probably untrue, and is a perception caused by the number of arseholes who self-diagnose but who wouldn't get an actual dx, and who then use that as an excuse to continue to behave like arseholes.
I know a lot of autistic people, and a few of them are arseholes, but they are entirely ordinary arseholes. Their arseholery is very much the same as the arseholery from NT people, which makes me think it's not the autism.
I don't think that's the assumption. The point I was making is that that even for non-neurodiverse people it's exceptionally difficult to communicate in a way that never leads to someone taking offense or being made feel uncomfortable when working with people from different backgrounds, cultures and experiences, all under high stakes conditions.
We all constantly put feet in our mouths despite our best intentions (see the whole concept of micro aggressions) and being able to navigate subtle social situations when that inevitably happens is difficult for everybody. Much more so for someone who is worse at reading nonverbal cues and struggling with anticipating "how will this make them feel?"
There is plenty of room for offense and misinterpretation between the most benign accidental faux pas and giant asshole moves, and that's where I suspect most of the rope to hang yourself with lies.
There's a quote from He Who Shall Not Be Named here that is an interesting datapoint from a recent event, echoing my point: https://tech.slashdot.org/story/17/11/19/043243 . I suspect he wasn't a giant asshole, but maybe others would argue otherwise.
In reality I don't expect neurodiverse individuals to end up as cases on HR's desks: I would be shocked to see harassment anywhere near the top of the list of situations that might arise from this push for inclusion. Awkward situations in intra-team interpersonal dynamics? Sure. But real harassment, not likely.
I know a lot of autistic people, and a few of them are arseholes, but they are entirely ordinary arseholes. Their arseholery is very much the same as the arseholery from NT people, which makes me think it's not the autism.