2010s aside, in the context of this article and discussion, there has been no infringement on freedom of speech.
When you engage discourse within an institution, you are subject to an informal, sometimes formal social contract. If you entered a christian church in 1789 making certain statements, you would be removed (censored) from the church at the minimum. That still holds true today. Only today, this private institution is no small church with a handful of people, but billions. Still, under our current framework it is a private institution with a social contract that its users have agreed to, formally, or informally. There has been no violation of free speech because it is not a public institution. If you feel there's a moral violation, you can either choose not to participate as is your right, or you can petition, as is your right, to have the state get involved with how this private institution conducts itself.
When you engage discourse within an institution, you are subject to an informal, sometimes formal social contract. If you entered a christian church in 1789 making certain statements, you would be removed (censored) from the church at the minimum. That still holds true today. Only today, this private institution is no small church with a handful of people, but billions. Still, under our current framework it is a private institution with a social contract that its users have agreed to, formally, or informally. There has been no violation of free speech because it is not a public institution. If you feel there's a moral violation, you can either choose not to participate as is your right, or you can petition, as is your right, to have the state get involved with how this private institution conducts itself.