I don’t know of the others, but Gab is not a racist site. They do not censor content or speech. The leftist media can’t have that, hence the smear campaign.
The label of racism is sufficient for Big Tech to ban them from app stores.
Liberals are following Islam’s example. Once someone is labeled a blasphemer, violence against them by any and all true believers is permitted, no services or aid permitted, no ability to challenge the label in a fair trial, even police withdraw their protection from the liberal hate mob.
All they have to do is apply the label, and all vestiges of civil society and behavior vanish. You’re a witch, hunt down the witch.
The fact that the innocent may be accused and harassed or accosted is irrelevant. Or they consider it acceptable because the fear of being similarly threatened keeps people publicly in ideological lockstep ... similar to how Islam demands utter conformity with the ideology in public for the good in their minds of the ideology. Make it a totally encompassing, oppressive environment.