[Zuider]

Your argument is mistaken on both counts. The smear and de-platform campaign began when Gab reported the details and profile of the synagogue murderer to law enforcement, providing them with "concrete evidence for a motive that they can use in a case to seek justice against this awful monster."

As for the 'people and organizations attempting to shut Gab down, or and/or be critical of them', they are 'assuredly not doing so' on the grounds Gab hosted violent anti-Semitic and extremist material. Otherwise they would express equal outrage at the violent anti-Semitic tweets from Louis Farrakhan, one example among many, who uses the exact same rhetoric as the Pittsburgh shooter. The 'mail bomber' Cesar Sayoc Jr. also made numerous violent threats on twitter. In neither case are there calls to shut Twitter down.