And as we all know, the diverse communities of Libya, Syria, Myanmar and Yugoslavia all pulled together as one when crisis hit. Californian law enforcement still back neo-nazis, the LAPD gives the deep south a run for their money in the racism department, and less said about Baltimore the better. People will talk of how ethnic food brings them together and pay lip service to multiculturalism, until the first sign of trouble.
So why is Japan more cohesive than Syria? Why is India becoming more and more fractured? Why did the Soviet Union, one of the most multicultural nations to ever exist, stagnate and fall apart? If Diversity is a strength, then they should be thriving.