I would disagree. There is a difference between publisher and platform. If Gab was publishing illegal stuff themselves, then it would be different. Gab actively takes down speech which is illegal (action to violence type). But simple hate speech (even if it's offensive and rude) is still free speech and legally covered by the first amendment in the US.
Same way Google isn't held liable for hosting illegal pirated content as long as they take it down. But you can't go sue Google because they show you news about something which you find offensive.
Same way Google isn't held liable for hosting illegal pirated content as long as they take it down. But you can't go sue Google because they show you news about something which you find offensive.