Those on the idiot fringe, mindless lefties, are worked up about the term no go zones. Back in the 80s visitors from the UK described them in the USA. There were high crime areas but the risks were hyped in the foreign press.
The obnoxious Euros talked about high crime areas as "American conditions ". Now they have their own slums and high crime areas. Are there high crime areas in America with mostly Non white resident? These enclaves exist and are only eliminated when a worse crowd invades, hipsters.
What happens when Euro hipsters move into the slums on Europe is unknown. Of course you could end up with hipsters making a type of beatnick jihadi type. As hipsters never get the substance of anything right we could end up with something comedic and creepy.