We all know about communist regimes suppressing the free speech of their people. Whoever thought it could happen here in the land of the free?

A bombshell report by Gizmodo, a trusted technology news source, suggests Stalin-worthy airbrushing and suppression of free speech is, in fact, happening here. Quoting former Facebook employees, Gizmodo says that the social media giant has been routinely censoring conservative news topics and ?political content from appearing in its highly viewed “Trending News” section.

These ex-Facebook employees, known as “curators,” manage this highly important news feed section viewed by millions. And now they’ve come forward saying that Facebook deliberately blocked news stories about CPAC, Mitt Romney, Glenn Beck, Rand Paul and other ?political topics of interest from being displayed among its top trending stories.

“Depending on who was on shift, things would be blacklisted or trending,” Giz-?modo quoted one former ?curator saying.

Up until now, Facebook users have been led to believe that “Trending News” stories landed there “organic­ally,” buoyed by massive public discourse. Now we’ve learned they’ve been actively squelching political speech much like the state-run ?media operations in totalitarian North Korea and China do.

Not only are we told that Facebook curators blocked speech they simply didn’t like, they artificially inserted topics in the “Trending Now” section that were never trending to begin with. The disappearance of Malaysia Airlines flight MH370 and the Charlie Hebdo attacks in Paris were two such cases.

Talk about a violation of trust, not to mention a blow to our fundamental expectation of a free and honest flow of information — the kind the founding fathers had in mind when they drafted the First Amendment, rather than the carefully crafted distortions Mao and Lenin preferred.

Facebook issued a statement denying the Gizmodo report. But whether they’re telling us the truth is very much in doubt. What we do know is that Facebook’s ultra-lib-eral founder, Mark Zuckerberg, has a political agenda and doesn’t think twice about expressing it publicly.

It’s ironic that social media networks claim they can’t shut down all the radical Islamist terror groups recruiting and radicalizing on their sites, but when it comes to suppressing conservative free speech, it appears they’ve magically found a way.

This should send a chill up every American’s spine because if one social ?media network can censor free speech and manipulate the content in our news feeds to advance a political agenda, so can others.

Buyer ?beware.

Adriana Cohen is a Boston Herald columnist and co-host of “Herald Drive” airing 6-9 a.m. weekdays on Boston Herald Radio. Follow her on Twitter ?@AdrianaCohen16.