IMO censorship is wrong. To quote someone smarter than me: > I disapprove of what you say, but I will defend to the death your right to say it. https://quoteinvestigator.com/2015/06/01/defend-say/
that person didn't realize the damage propaganda could do with modern tools. Unfortunate reality is our cognitive biases can be exploited, and complete freedom of speech is not in the best interest of the majority of humanity. This is a "loophole" that is exploited over and over again by climate change denialists, cigarette companies, nazis...
To use your idea here - the cognitive biases being exploited are being exploited by youtube itself. In this example, Icke is a relatively divisive character even on the right wing. So it becomes important to ask - of the controversial figures that remain (on both sides) what cognitive biases is Google/Youtube aiming to exploit by allowing them to continue?