> but a ban on specific implementations that make it easy to join specific communities which encourage hatred and real-world violence

So basically, Google only supports the Fediverse if, like itself, it engages in censorship. The Fediverse exists not to encourage hate speech, but to discourage censorship. Hate speech is the inevitable result of allowing humans to say what like they like. Some people will choose to be nasty. Many people believe the greater good is the free flow of information, and that adults are more than capable of filtering out and avoiding those information sources which make them uncomfortable. Instead, Google wants to treat everybody like children, and be the helicopter parent that swoops in and removes anything objectionable.