The UN’s human rights chief has compared controversial Dutch politician Geert Wilders to Donald Trump, Nigel Farage and Isis, in a hard-hitting speech at The Hague.

Zeid Ra’ad al-Hussein, who has held the position for two years, called for action to confront European and US politicians who breed “an atmosphere thick with hate”, as he fears it “may descend into violence”.

The speech was primarily focused on Mr Wilders, who recently said he wants to fight Islam and ban all mosques.

Dutch Right Wing Politician Geert Wilders Rails Against Islam and Endorses Trump

Mr Wilders, who is the leader of the most popular party in the Netherlands, released a 11-point plan pledging to ban expressions of faith considered “contrary to the country’s order” and says mosques, Islamic schools and asylum centres will be closed.

Mr al-Hussein described the plans as “grotesque” and said populists use "half-truths and over-simplifications".

"What Mr. Wilders shares in common with Mr Trump, Mr Orban, Mr Zeman, Mr Hofer, Mr Fico, Madame Le Pen, Mr Farage, he also shares with Daesh [Isis]," he said.

“All seek in varying degrees to recover a past, halcyon and so pure in form, where sunlit fields are settled by peoples united by ethnicity or religion – living peacefully in isolation, pilots of their fate, free of crime, foreign influence and war,” he said.

“The formula is therefore simple: make people, already nervous, feel terrible, and then emphasise it’s all because of a group, lying within, foreign and menacing.”

The 52-year-old, who is the son of Prince Ra'ad bin Zeid, Lord Chamberlain of Jordan and previously served as Jordan’s mbassador to the US, was sure to clarify his position on Isis, describing them as “monstrous and sickening”.

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“Make no mistake, I certainly do not equate the actions of nationalist demagogues with those of Daesh, which are monstrous, sickening; Daesh must be brought to justice.

“But in its mode of communication, its use of half-truths and oversimplification, the propaganda of Daesh uses tactics similar to those of the populists.”

He finished the speech with a rallying call, warning everyone not be led by the deception and asking people to “speak out and up” and to “speak the truth”.

The speech in full:

"Dear Friends,

I wish to address this short statement to Mr. Geert Wilders, his acolytes, indeed to all those like him – the populists, demagogues and political fantasists.

To them, I must be a sort of nightmare. I am the global voice on human rights, universal rights; elected by all governments, and now critic of almost all governments. I defend and promote the human rights of each individual, everywhere: the rights of migrants, asylum seekers and immigrants; the rights of the LGBTi community; the rights of women and children in all countries; minorities; indigenous persons; people with disabilities, and any and all who are discriminated against, disadvantaged, persecuted or tortured – whether by governments, political movements or by terrorists.

I am a Muslim, who is, confusingly to racists, also white-skinned; whose mother is European and father, Arab. And I am angry, too. Because of Mr. Wilder’s lies and half-truths, manipulations and peddling of fear. You see, twenty years ago I served in the UN peacekeeping force during the Balkan wars – wars so cruel, so devastating, which flowed from this same factory of deceit, bigotry and ethnic nationalism.

Geert Wilders released his grotesque eleven-point manifesto only days ago, and a month ago he spoke along similar lines in Cleveland, in the United States. I will not repeat what he has said, but there are many who will, and his party is expected to do well in the elections in March.

Dutch politician Gert Wilders on the convention floor in Cleveland (Getty)

And yet what Mr. Wilders shares in common with Mr. Trump, Mr. Orban, Mr. Zeman, Mr. Hofer, Mr. Fico, Madame Le Pen, Mr. Farage, he also shares with Da’esh.

All seek in varying degrees to recover a past, halcyon and so pure in form, where sunlit fields are settled by peoples united by ethnicity or religion – living peacefully in isolation, pilots of their fate, free of crime, foreign influence and war. A past that most certainly, in reality, did not exist anywhere, ever. Europe’s past, as we all know, was for centuries anything but that.

The proposition of recovering a supposedly perfect past is fiction; its merchants are cheats. Clever cheats.

Populists use half-truths and oversimplification -- the two scalpels of the arch propagandist, and here the internet and social media are a perfect rail for them, by reducing thought into the smallest packages: sound-bites; tweets. Paint half a picture in the mind of an anxious individual, exposed as they may be to economic hardship and through the media to the horrors of terrorism. Prop this picture up by some half-truth here and there and allow the natural prejudice of people to fill in the rest. Add drama, emphasizing it’s all the fault of a clear-cut group, so the speakers lobbing this verbal artillery, and their followers, can feel somehow blameless.

The formula is therefore simple: make people, already nervous, feel terrible, and then emphasize it’s all because of a group, lying within, foreign and menacing. Then make your target audience feel good by offering up what is a fantasy to them, but a horrendous injustice to others. Inflame and quench, repeat many times over, until anxiety has been hardened into hatred.

Make no mistake, I certainly do not equate the actions of nationalist demagogues with those of Da'esh, which are monstrous, sickening; Da’esh must be brought to justice. But in its mode of communication, its use of half-truths and oversimplification, the propaganda of Da’esh uses tactics similar to those of the populists. And both sides of this equation benefit from each other – indeed would not expand in influence without each others' actions.

Wilders' party would shut down all mosques in the Netherlands. Pictured: the Mevlana Mosque in Rotterdam (AFP/Getty Images)

The humiliating racial and religious prejudice fanned by the likes of Mr. Wilders has become in some countries municipal or even national policy. We hear of accelerating discrimination in workplaces. Children are being shamed and shunned for their ethnic and religious origins – whatever their passports, they are told they are not "really" European, not "really" French, or British, or Hungarian. Entire communities are being smeared with suspicion of collusion with terrorists.

History has perhaps taught Mr. Wilders and his ilk how effectively xenophobia and bigotry can be weaponized. Communities will barricade themselves into fearful, hostile camps, with populists like them, and the extremists, as the commandants. The atmosphere will become thick with hate; at this point it can descend rapidly into colossal violence.

We must pull back from this trajectory. My friends, are we doing enough to counter this cross-border bonding of demagogues? A decade ago, Geert Wilder’s manifesto and Cleveland speech would have created a world-wide furore. Now? Now, they are met with little more than a shrug, and, outside the Netherlands, his words and pernicious plans were barely noticed. Are we going to continue to stand by and watch this banalization of bigotry, until it reaches its logical conclusion?

Ultimately, it is the law that will safeguard our societies – human rights law, binding law which is the distillation of human experience, of generations of human suffering, the screams of the victims of past crimes and hate. We must guard this law passionately, and be guided by it.