“This (multicultural) approach has failed, utterly failed,” Merkel told the meeting in Potsdam, south of Berlin.Americans (and Canadians, Australians), who have the most experience of people who are actually quite different getting along, could have told her that it is nonetheless very hard. Except that even many Americans seem to have forgotten this recently. Tribes do not naturally get along with other tribes very well. What seems to work best is that they trade and do business with each other for a while, testing each other out. Trade and business also gives each of them a focus and distraction from sitting around thinking how evil those other guys are. They are too busy earning a living to put much energy into that.
The more common modern belief is that people would just naturally get along if they weren't taught to hate. They know this from living in all-white places like Vermont and Sweden, tut-tutting about the bad behavior of those who actually live with other races, religions, and classes. Our betters have been teaching us this crap all of my life.