https://twitter.com/ylecun/status/1277372578231996424
saying:
"Following my posts of the last week, I'd like to ask everyone to please stop attacking each other via Twitter or other means. In particular, I'd like everyone to please stop attacking @timnitGebru and everyone who has been critical of my posts."
I also find your question about why people attacked her, as if people in the internet always have good reasons to attack others, is an incredibly silly attempt to appeal to the Bandwagon fallacy.
Now go and look at how she has handled it and how she argued with Lecun. Then she also thratens people if she does not get her way. There is ample evidence for her behavior. Does she behave like this all the time? Of course probably not. But the fact that she is openly behaving like this is a clear data point. If you can not see this behavior as not suitable in a work environment, then lets hope we never work together.