You are making stuff up. "hate speech" is not a thing in the first amendment. Hate speech is protected. There are countless court rulings on this.
Exhibit A: "in 1977 a federal court upheld the right of neo-Nazis to goose-step right through the town of Skokie, Illinois, which had a disproportionately large number of Holocaust survivors as residents."
>>In this country there is no right to speak fighting words—those words without social value, directed to a specific individual, that would provoke a reasonable member of the group about whom the words are spoken. For example, a person cannot utter a racial or ethnic epithet to another if those words are likely to cause the listener to react violently.
In particular, application of "fighting words" pretty much requires that the speaker and listener were in close physical proximity, such that a fight could actually occur. Not really relevant to twitter, for the most part.
Nope, First Amendment does not protect hate speech.