I'm not going to go into the whole never ending quote one line and respond out of context thing.
A few things. First, I never said Twitter had to do anything. Someone said to me that lies are not free speech and I responded to that.
You get the kind of society we live in now where people are free to voice their opinions and don't generally kill each other over their opinions because of free speech. If you take away the free speech, things may not immediately escalate into violence, but they will eventually. If you can't have a war of ideas, the people being censored will fight to the death. It has happened over and over and happens to this day.
As for reasonable limitations on free speech, now you're getting into definitions that not everyone agrees on. You could claim something is a reasonable limitation on free speech, and I could claim you are censoring things to further your own power over other people. If there can be no discussion, there can only be violent struggles for power.