Google can't claim immunity from what they allow others to post on their platforms. I don't have a problem with them being held accountable.
What do you censor then though, and who decides it? I think sites like Twitter and Facebook should allow anything unless it's illegal, but that's just my opinion. Harassment is illegal, for example, and so is wishing group X or Y "be killed off" etc. or any threat of violence Planning terrorism, whether from arab or white radicals, should also not be allowed.
The internet has a ridiculous amount of stuff that isn't meant for kids or teens. We don't want to start burning books.