I’ve noticed this myself:
The viciousness of online discourse has been pondered from many perspectives, but it really comes down to the fact that people think they can say anything they want and never get their asses kicked for it.
Shoot, there are people who’d tell me that this is my business plan. Although probably not to my face, which is sort of the point*.
*One of the fascinating things about the years 2001-2009 was watching a bunch of putatively intelligent people never quite work out that if the American government was as bad as they were claiming those people would not be allowed to publicly complain about it. An observation that is probably still applicable today, alas.