This is the reason that is given, that you have chosen to accept.
The catch is, they label their own violence as speech, and their opponents speech as violence, conveniently.
Hidden camera interviews with numerous employees of the multiple tech monopolies in question reveal that not only do they in target people for censorship based upon their political beliefs and political speech, and in the service of the political parties to which they also overwhelmingly donate, but they do so with glee.
The actions of Facebook, Google, Twitter in their selective banning, deplatforming, and other algorithmic weaselry is often indistinguishable from an in-kind donation directly to the DNC.