Calling China's firewall "regulation" is a bit of an understatement, and framing it as Facebook and Google have "chosen not to operate" is very clever. At best it's an oversimplification rather than straight up propaganda but either way it's not one would call especially accurate because the principles aren't the same. While I'm sure the FBI, DHS, and DEA would love to get their hands on everyone's private communications, the courts, even at their most egregious, have resisted legalizing the blanket dragnet of the plaintext of American citizens' private communications that the Great Firewall is designed to enable of Chinese citizens. (Which is their right to do as a sovereign nation.) Thus calling it the same thing is like saying that a card board box is the same thing as a McMansion - they both provide shelter, but upon closer inspection, they're clearly not, in any way, equal, unless you wilfully ignore the details.