This effort at mass censorship across all social media platforms falls under anti-trust legislation and is evidence of monopoly activity.
Use RICO against them, break them up like they did ATT in the 1970s. Turn them into public utilities.
The internet infrastructure is a public platform/utility, paid for, built, and supported by US tax dollars. It is a public infrastructure; therefore, while they can censor within their own offices, once they take that out to the internet and use the public infrastructure in the course of their business, they have to comply with US laws and they can't use Obama's NDAA because they are not 'news' organizations so are not exempt from propaganda laws.