The reason it is anathema to the Wikipedia concept is because Wikipedia wants its name on good content, not Alex Jones JOOZ-DID-IT (Oh, and Aliens-Big-Pharma-Bilderberger-USPS-Did-9/11 Too) bullshit, unless such bullshit is clearly marked as coming from a specific minority viewpoint.
I think that's a great reason to keep the crap on the current version of Wikipedia to a minimum: The world is confusing, especially when there are people like Alex Jones out there trying to make it more confusing to sell more videos. Having something where you have a good chance of getting the Sane People Version of controversial (or only-controversial-because-of-the-crazies) topics is invaluable if you want somewhere to start. Especially if it's a topic that books aren't really written about, like specific health scams.
So the Federated Wiki universe will need some way to mark specific forks of articles as being from a given group of people, so people aren't mislead into thinking that the sane editors approve of the version of reality Alex Jones is selling the gullible.