This article by someone who's worked with immigrants for many years http://nationalinterest.org/feature/ive-worked-refugees-decades-europes-afghan-crime-wave-mind-21506 is profoundly depressing. Here's an extract but do read the whole piece:
'This brings us to a third, more compelling and quite disturbing theory—the one that my Afghan friend, the court translator, puts forward. On the basis of his hundreds of interactions with these young men in his professional capacity over the past several years, he believes to have discovered that they are motivated by a deep and abiding contempt for Western civilization. To them, Europeans are the enemy, and their women are legitimate spoils, as are all the other things one can take from them: housing, money, passports. Their laws don't matter, their culture is uninteresting and, ultimately, their civilization is going to fall anyway to the horde of which one is the spearhead. No need to assimilate, or work hard, or try to build a decent life here for yourself—these Europeans are too soft to seriously punish you for a transgression, and their days are numbered.
And it's not just the sex crimes, my friend notes. Those may agitate public sentiment the most, but the deliberate, insidious abuse of the welfare system is just as consequential. Afghan refugees, he says, have a particular proclivity to play the system: to lie about their age, to lie about their circumstances, to pretend to be younger, to be handicapped, to belong to an ethnic minority when even the tired eye of an Austrian judge can distinguish the delicate features of a Hazara from those of a Pashtun.
I see his point. In the course of my research, I encountered thirty-year-olds with family in Austria who were passing themselves off as "unaccompanied minors." I met people misrepresenting an old traffic injury as proof that they had been tortured. I learned of an Afghan family that had emigrated to Hungary two decades ago. The children were born there and attended Hungarian schools. When the refugee crisis erupted, enticed by news of all the associated benefits, this family decided to take on a new identity and make their way to Sweden on the pretense of being brand-new refugees. Claiming to have lost their papers during their "flight," they registered under new assumed names and reduced the ages of their children; the mother declared herself a widow. Now ensconced in comfortable free housing along with their hale, hearty and very much alive father—whom they pass off as an uncle—with a monthly welfare check, they are smug parasites leeching off the gullibility of Sweden's taxpayers.'
Do read the whole piece to learn about the types of attacks and the way that these 'refugees' game Europe's legal systems to ensure that they can never be deported away from their European benefits.
A unbiased, unobsessed by promoting immigration especially from the Muslim world BBC would report this sort of article but that isn't what the BBC is.