I don't think that the American Government are the ones forcing Facebook to censor information-- Facebook seems to do plenty of censorship on it's own.
Despite "the Russians buying the election with Facebook ads" argument, ex-Facebook employees routinely censored Conservative flavored news stories:
https://gizmodo.com/former-facebook-workers-we-routinely-suppressed-conser-1775461006
So, yes, facebook is doing some censorship again, that meets their own agenda.
“We operate under the constraints of US laws, which vary by circumstance.”
This sounds like they're hiding behind American Law. I doubt anyone forced them to censor anything.