San Francisco (AFP)

The clash between Twitter and Donald Trump splashes Facebook, in a delicate position since its boss, Mark Zuckerberg, refused to sanction polemical remarks of the president and is publicly disavowed by employees - a rare phenomenon in Silicon Valley.

"Mark is wrong, and I'm going to try to make him change my mind by making a lot of noise," Ryan Freitas, design director for Facebook's News Feed, said on Sunday. He said that he had gathered around fifty people of the same opinion.

Originally, two unprecedented Twitter interventions last week.

The platform first reported two tweets from the US president about postal voting with the words "check the facts".

Mark Zuckerberg then reminded Fox News that the platforms, he said, should not play the role of "arbiters of the truth online" - an interview retweeted by Donald Trump.

Then, on Friday Twitter masked another message from the White House tenant, about the clashes in Minneapolis after the death of a black man, George Floyd, for violation of the network's directives on the apology of violence.

"The lootings will be immediately greeted by bullets," said Donald Trump of the protests which degenerate into riots.

These comments also appear on Facebook, but Mark Zuckerberg decided to leave them visible, "after hesitating all day".

In a post on his profile, he said that he condemned the "divisive and inflammatory rhetoric" of the president as "personal", but did not intend to delete the messages, in the name of freedom of expression and the public interest in get informed.

- The rebels of the network -

"I know that many people are unhappy (...), but our position is to facilitate as much expression as possible, unless there is an imminent risk of harm to others or of dangers as described in our regulations" .

Twitter and Facebook have set up systems to combat dangerous content (hate speech, harassment, etc.) and against disinformation.

But Facebook exempts political figures and candidates from the essential of these measures.

"I don't know what to do, but I know that doing nothing is not acceptable. I am a Facebook employee who completely disagrees with Mark's decision to do nothing about recent Trump posts, which clearly incite violence, "Jason Stirman, a research and development officer for the company, tweeted on Saturday on Saturday.

"I am not alone at Facebook. There is no neutral position on racism," he added.

In fact, several other employees spoke on Sunday.

"I think Trump's tweet (on looting) encourages extrajudicial violence and fuels racism. Respect for the Twitter team," writes designer David Gillis.

"Doing nothing is not being daring. This is what many of us feel," said developer Nate Butler.

- Call to a friend -

To make matters worse, the American press revealed on Sunday that Mark Zuckerberg and Donald Trump met on Friday by telephone.

The conversation was "productive," according to anonymous sources on the specialty site Axios and the CNBC channel. It has neither been confirmed nor denied by the parties concerned.

The phone call with the president discredits the idea of ​​a so-called "neutrality", according to Evelyn Douek, researcher at Harvard Law School.

Like other experts, she questions the ability of Facebook's all-new "Supreme Court" to intervene.

"We are aware that people want the Council to address many important issues related to online content," said the network's "Supervisory Council", which took shape earlier this month.

He is supposed to have the final say on whether or not to maintain controversial content, independently.

The network giant is directly affected by Donald Trump's counterattack against Twitter.

The US president signed a decree on Thursday attacking a fundamental law of the American internet, Section 230, which offers digital platforms immunity from any legal action related to content published by third parties. And gives them the freedom to intervene as they please to police the exchanges.

© 2020 AFP