Of course its a failure........its only successful in the minds of the hard left!!

People who emigrate to other cultures and choose not to embrace that culture = a fcukking disaster. We're seeing it all over Europe. France has already seen two rounds of violent riots in the past 3 years......from Muslim youths!!! Thankfully, there are signs that native European's in France, and now Germany, are waking up!!!
Shit......even Jimmy Carter made public statements on the campaign trail in 1975........that segregated communities/cultures are probably logical.
Carter was absolutely right. Voluntary segregation is a natural occurrence and enforced integration will inevitably create more problems than it solves.
I was born and raised in Brooklyn, NY, which was a very different place back in the 30s, 40s and 50s from what it is today. Brooklyn was a city of neighborhoods, "sections" as they were called. Bensonhurst was the Italian section. Flatbush was inhabited mainly by Jews. Nordics and Germans gravitated to Bay Ridge. And although there were no Jim Crow laws in New York the Bedford Stuyvestant section was to Brooklyn what Harlem was to Manhattan. "Bed-Stuy" as it was called was the Black section and it consisted of high-value real estate as well as the "ghetto" district.
Because there were no mandatory segregation laws, where one lived depended almost entirely on how much one could afford. There were Blacks who lived in some White areas, such as Park Slope, which was and still is a rather Bohemian neighborhood with a diverse mixture of ethnicities and economic levels.
In spite of it being an almost totally segregated city, people in Brooklyn got along just fine and there never were any ethnic conflicts. Those things didn't start happening until the late 1960s, after the civil rights laws imposed mandatory integration policies. That's when the troubles started, culminating with the Crown Heights riot of 1991 in which mobs of Blacks ran amok for days, rampaging through an Hassidic Jewish neighborhood, shouting
"Kill the Jews," breaking windows, overturning cars, beating Jewish men they found on the streets, killing two.
The provocation for that riot, which was triggered by a traffic accident, turned out to be several years of smoldering resentment of Hassidic Jews who had been methodically buying up real estate on the edge of Bedford-Stuyvestant (Crown Heights) and displacing Blacks who had lived there for most of their lives, the irony being the violent riot was caused by White people strategically moving into a Black neighborhood where they weren't wanted.
Crown Heights riot - Wikipedia, the free encyclopedia