Ridiculous hyperbole. First, because it imagines that people get killed for tweets, and second because it hilariously invokes the idea that this is a new thing. You genuinely don't think people have been persecuted for opinions in the past? Let me get my dead buddy Galileo to drop a few rocks on your head.
Likewise McCarthyism, etc... Objectively free expression of inconvenient conservative ideas in the US has never been cheaper, freer, easier or more pervasive than it is RIGHT NOW. Good grief, just look at your own posts. You don't look like someone afraid of being killed by a mob.