https://www.hollywoodreporter.com/news/trayvon-martin-spike-...
You are missing the forest for the trees.
Edit: Don't understand the sentiment. Are there any radical left accounts with as much reach as the POTUS, that engage in similar behaviour that I am not aware of? If they exist, they should be trivial to link to. Looking at the top Twitter accounts, they consist of Barack Obama, YouTube, Modi, Bill Gates and a bunch of celebrities. Are any of those folks radical left? Will Lady Gaga or Katy Perry be opening the 2021 Superbowl halftime with "Internationale?"
I think so. The GP's use of the term "leftist lunatics" reads as a right-wing shibboleth to me.
Twitter's business model is totally reliant on controversy. They want to treat/control, but not cure/extinguish.
Which is a separate reason that twitter's ethically conflicted in making almost any judgment calls on what's "allowable" speech.
Additionally, the nature of mud-slinging politics requires that ones opponents "follow" his online presence in able to attack. So if Trump leaves Twitter, not only do his followers go to whatever new platform he does, but so must his adversaries.
Twitter doesn't want that.