That's a novel take on diversity, but I think your window is too small. The US was full of similar anti-immigrant sentiment a century ago, directed at southern

That's a novel take on diversity, but I think your window is too small. The US was full of similar anti-immigrant sentiment a century ago, directed at southern and eastern European new arrivals. Today no one is calling for Poles and Italians to be deported. The "melting pot" can work, if no one is actively trying to kick it over.