"We don't see these people as Muslim refugees. We see them as Muslim invaders," Orban said in a recent interview with German daily Bild newspaper. The 54-year-old prime minister of Hungary added: "We believe that a large number of Muslims inevitably leads to parallel societies, because Christian and Muslim society will never unite." Multiculturalism, he said, "is only an illusion."

When asked by Bild whether it was fair for Germany to accept hundreds of thousands of refugees and migrants while Hungary accepted none, Orban responded: "The difference is, you wanted the migrants, and we didn't." Migration, he said, threatens the "sovereignty and cultural identity" of Hungary.

It was not the first time the Hungarian leader has framed migration as a problem for his country. In 2016, he said that Hungary "does not need a single migrant for the economy to work, or the population to sustain itself, or for the country to have a future." He added: "for us migration is not a solution but a problem ... not medicine but a poison, we don’t need it and won’t swallow it.”

Orban has repeatedly criticized German Chancellor Angela Merkel for her decision to allow over a million migrants into Germany in the summer of 2015. Orban told Bild in early 2016: "If you take masses of non-registered immigrants from the Middle East into your country, you are importing terrorism, crime, anti-Semitism, and homophobia."

Orban has also repeatedly criticized the EU for trying to get member states to share refugees based on national quotas. In a 2015 interview with POLITICO, he suggested the bloc's leaders instead focus more on strengthening the EU's external border. In the same interview, he said: "Of course it’s not accepted, but the factual point is that all the terrorists are basically migrants."

Orban has found allies in other right-wing governments in eastern Europe such as Poland that also oppose the EU's refugee policies. In an interview with Spanish TV channel Intereconomia in 2015, Orban raised fears about integrating Muslim migrants in the EU when he said: "What sort of Europe do we want to have? Parallel societies? Muslim communities living together with the Christian community?"

In late 2014, with the war in Syria approaching its fourth year and Islamic State making gains in the north of the country, the exodus of Syrians intensified. At the same time, others were fleeing violence and poverty in countries such as Iraq, Afghanistan, Eritrea, Somalia, Niger and Kosovo.

Vast numbers of Syrian refugees had been gathering in border-town camps in neighboring Turkey, Lebanon and Jordan since 2011. By 2015, with the camps full to bursting and residents often unable to find work or educate their children, more and more people decided to seek asylum further afield.

In 2015 an estimated 1.5 million people made their way on foot from Greece towards western Europe via the "Balkan route". The Schengen Agreement, which allows passport-free travel within much of the EU, was called into question as refugees headed towards the wealthier European nations.

Tens of thousands of refugees were also attempting the perilous journey across the Mediterranean on overcrowded boats. In April 2015, 800 people of various nationalities drowned when a boat traveling from Libya capsized off the Italian coast. This was to be just one of many similar tragedies - by the end of the year, nearly 4,000 refugees were reported to have died attempting the crossing.

Countries along the EU's external border struggled to cope with the sheer number of arrivals. Fences were erected in Hungary, Slovenia, Macedonia and Austria. Asylum laws were tightened and several Schengen area countries introduced temporary border controls.

Critics of German Chancellor Angela Merkel's "open-door" refugee policy claimed it had made the situation worse by encouraging more people to embark on the dangerous journey to Europe. By September 2016, Germany had also introduced temporary checks on its border with Austria.

In early 2016, the EU and Turkey signed an agreement under which refugees arriving in Greece could be sent back to Turkey. The deal has been criticized by human rights groups and came under new strain following a vote by the European Parliament in November to freeze talks on Turkey's potential accession to the EU.

With anti-immigration sentiment in Europe growing, governments are still struggling to reach a consensus on how to handle the continuing refugee crisis. Attempts to introduce quotas for the distribution of refugees among EU member states have largely failed. Conflicts in the Middle East and elsewhere show no signs coming to an end, and the death toll from refugee sea crossings is on the rise.