Glenn Greenwald: Big Tech is censoring Covid debate

Though it would be difficult to prove damages, holding tech companies liable for any harm done that could have been avoided if information they suppressed were allowed to have been communicated will set off some alarms in their legal and risk departments. There is much we still do not know about COVID19, the vaccines, and alternative treatments. It is almost certain that some of what we now believe to be true will ultimately be proven to be incorrect. There are many conflicting studies going around and tech companies have decided which ones are truth and which ones are not. Since they have appointed themselves as the arbiters of truth, they should be held liable for any "truth" they get wrong. If they do not want this liability, then they must refrain from deciding what medical information is correct and what should be suppressed. No hiding behind medical authorities as there are multiple conflicting medical authorities and tech companies have decided which ones they bless as truthsayers and which ones they have derided as falsifiers. There is no way for them to avoid making choices once they get themselves involved in the business of censorship and suppression. Their choices, their consequences.

Or they can be conduits and avoid this risk entirely.

It's not "censorship" because it's private property, right?

May someone explain what they are actually "censoring"?