The person is being incredibly rude:
- pointing out that I didn't explicitly say 'negative things' rather than 'things' is a bizarre and immature nitpick
- pointing out that other people also share credit for Elon's innovations - my comment never made stated that Elon deserves exclusive credit for this, this is a straw man
- including zero supporting arguments for their assertion that fraud and abuse wasn't discovered
- equating helping disabled people interact with the world to helping a single disabled person with a task.
...as the comment you're responding to points out.
OK. I wouldn't call this rude, much less "incredibly rude," perhaps the word I'd use is "blunt." But whatever. I continue to wish there was a "block this user" feature on this site.