That is super unhinged and disheartening to hear, but what can you expect from the toxicity on Twitter hive mind of nastiness?
SimguruNinja is definitely very kind and that's really awful to hear that. I severely hope the people that say such nasty things realize those are serious threats that can put you right in jail. Personal threats to someone over a game is a certain kind of nastiness for sure. You don't have to like the game and you can have grievances, but you absolutely should NOT harass the sims team in any sort of manner over it.
Truly disgusting. That's really the ugly part of the community.