> autistic spectrum than normal people do. So most likely many of the commentators just don't have the biological wiring for feeling empathy like many others do
This is outdated. Assuming you are using "empathy" conversationally, it's driven by the fact that people higher on the autistic spectrum don't perceive what other people feel very well, and historically this was misinterpreted. The comments on HN aren't "I don't understand why anyone would be upset". They are "it's only business". Those who claim that they are autistic so they can be assholes are just assholes who are happy to lie to try to justify it socially.
Or, people with autism have a correlation to issues with cognitive empathy (recognizing what another person's mental state), but not affective empathy (the desire to respond to the other person's mental state.)[1]
> Musk would probably have given someone those three months to find other employment, seeing as he gave Twitter employees up to six months.
Has it changed again? Last I saw was 3 months. At any rate, he started and continues to try to get people to quit by a lot of policy changes. And has a history of burning out his employees in fairly harsh ways.
You can say he's effective, but he doesn't sound pleasant to work for.
[1] https://www.nature.com/articles/s41398-017-0082-6