Here is my perspective, having many times stood on a corner of former Kyd Street, Calcutta.
The mass exodus of refugees into Europe is mindful of the mass human migrations and ill consequences of such that occured in India in the late post-war 1940s, the nights of death across the North and far East in Calcutta, in the Punjab, millions died, and also had it's roots in modern politicized Islamic radicalism just as these mass migrations do today into Europe.
When the expectations of these muslims hording into Europe, even if not yet radicalized, are not met, and frankly impossible to meet despite the free society and fairness of the European peoples, these muslim refugees are open to false grievance narratives and are easily the chatel of Islamic extremist propaganda which then radicalizes sectors of these Islamic enclaves in Europe, and now Europe not only has ISIS Islamic elements entering into Europe mixed in these crowds of muslims refugees, terrorists purposely invading to attack, you have populations of muslims in Europe who then eat up the false blame game against the very Euros they ran to for "rescue", ill mannered grievances often stoked on by far leftists who use voter fraud and the politics of grievance to try and entrench their totalitarian designs themselves, on Europeans who they went running to for refuge and build up an entire false narrative of blame and such grievance which radicalizes their ungrateful arrogance to become Islamic extremists themselves.
The added element is that, most all of these Islamic refugees consider themselves superior to Europeans even while rushing for refuge, never acknowledge many of their own cultural failures, and many are in fact racists who see muslims of their specific "community" in a convoluted way as a race and see Europeans as racially inferior to them and the first sign is their abuse of European police as these same refugees then go about as bullies and attacking all Europeans in general.
This is exactly why, we now see countries, who simply cannot afford nor ever manage these hordes in such numbers and at the same also protect the safety and security of their own people, and so seeing the refugees in categories and how to "divi-up" the numbers, they may be open to take in the Christians, Zorostrians, Jews and the other non-muslims among the refugees who are the greatest victims of Islamic terrorism and savagery, especially the Christians who are being exterminated in terrorist occupations in a modern holocaust, but are very leary of the muslim refugees who are more often full of arrogance and totalitarian in culture and many are cultural racists who readily blame the Europeans they took refuge with for all sorts of propagandized grievances and outrageous demands and expectations from such Europeans who have their own problems and cannot afford to surrender all their freedoms and assets and wealth to what becomes arrogant muslims full of their own superiority complexes that attempt to mask their own failures. Europeans are more clearly seeing such grievance and arrogance of such muslim elements as a threat by those who have an affinity to commit cultural genocide against Europeans, inclusive of actual assault.
Gandhi was wrong. Today we have Pakistan, the "world's first Islamic State" again rocketing India over the last couple of weeks and killing villagers, tottering on becoming another terrorist state with nukes, aligning with regimes in China and elsewhere who have designs on India. The very roots of this modern politicized Islamic radicalism was not in the Middle East, it was in the North West Frontier Province of what was former India now Pakistan from muslim "leaders" with totalitarian designs riding on the cheap printing press that built up a myth of the past of a utopian Ottoman Empire and "Khilafat" (their mispronunciation of Khalifat), a utopia which never was a utopia but a corrupt hell and in which none of these muslims ever lived in nor any of their ancestors and who were muslim politicians in India of a "race", Indo-European, that had little "racial" solidarity with those Arab peoples where elements of this modern terrorism spread to later in the 1950s and then extensively in the 70s.
Ironically, Gandhi is probably one of the key reasons we have Islamic terrorism today. A Hindu, an Indo-Aryan. Yet it was the Indo-Aryans in the former lands that were once Vedic but forcefully "converted" by the sword to Islamic dictatorship, that created this terrorism, not Arabs where it spread to later. It is a modern movement, not an historical Islamic movement. Islamic terrorism today has nothing to do with the Islamic invasions of hunderds of years ago. It is rooted in the muslim "leaders" in areas of former India who themselves did not believe in the myths they spread via the cheap printing press, they were only interested in their own tyranny and hopes of their own family dynasty and totalitarian control and power, most all were socialists (the harbingers of the Baathists) and most smoked and ate pork. Pakistan was to be their "royal carpet".
Unfortunately, the villagers who were the desendents of Islamic hegemony of the past ... believed their myths.
Europe is right in seeing this as a crisis. The Black Nights of Death, the Great Calcutta Killings, likely will be the Great Budapest Killings and the Black Nights of Paris, sooner than later if it is not stopped. The first to die will be the homosexuals, Jews, and atheists. Next will be the very far leftists who thought savages would be their little pet bullies.
Europeans need to look at their identity. How they do that is going to be dramatically impacted by this.