The mass movement of millions of people — from across Africa, the Middle East and further afield — into Europe has happened in record time and is a huge event in its history. As events in Paris, Cologne and Sweden have shown, it is also by no means a series of events only with positive connotations.

As well as being fearful of the security implications of allowing in millions of people whose identities, beliefs and intentions are unknown and — in such large numbers — unknowable, many Europeans are deeply concerned that this movement heralds an irreversible alteration in the fabric of their society. Many Europeans do not want to become a melting pot for the Middle East and Africa, but want to retain something of their own identities and traditions. Apparently, it is not just a minority who feel concern about this. Poll after poll shows a significant majority of the public in each and every European country opposed to immigration at anything like the current rate.

The sinister thing about what Facebook is doing is that it is now removing speech that presumably almost everybody might consider racist — along with speech that only someone at Facebook decides is “racist.”

And it just so happens to turn out that, lo and behold, this idea of “racist” speech appears to include anything critical of the EU’s current catastrophic immigration policy.

By deciding that “xenophobic” comment in reaction to the crisis is also “racist,” Facebook has made the view of the majority of the European people (who, it must be stressed, are opposed to Chancellor Merkel’s policies) into “racist” views, and so is condemning the majority of Europeans as “racist.” This is a policy that will do its part in pushing Europe into a disastrous future.

Because even if some of the speech Facebook is so scared of is in some way “xenophobic,” there are deep questions as to why such speech should be banned. In lieu of violence, speech is one of the best ways for people to vent their feelings and frustrations. Remove the right to speak about your frustrations, and only violence is left. Weimar Germany — to give just one example — was replete with hate-speech laws intended to limit speech the state did not like. These laws did nothing whatsoever to limit the rise of extremism; it only made martyrs out of those it pursued, and persuaded an even larger number of people that the time for talking was over.

The sinister reality of a society in which the expression of majority opinion is being turned into a crime has already been seen across Europe. Just last week, reports from the Netherlands told of Dutch citizens being visited by the police and warned about posting anti-mass-immigration sentiments on Twitter and other social media.

In this toxic mix, Facebook has now — knowingly or unknowingly — played its part. The lid is being put on the pressure cooker at precisely the moment that the heat is being turned up. A true “initiative for civil courage” would explain to both Merkel and Zuckerberg that their policy can have only one possible result.

Douglas Murray, a British writer, journalist and commentator, is based in London, England.