What is your point? Twitter isn't the government and doesn't carry a gun and doesn't get qualified immunity when they shoot people. But you knew that, right? Or are you one of those lovely people who thinks Twitter removing Qanon/Russian propaganda violates the first amendment?
The twitterati may not carry guns but they can certainly have a huge impact on people's lives and livelihoods, and while they don't explicitly have qualified immunity they often benefit from selective enforcement.