Virtually identical criticisms have been made ever since the Greeks settled Syracuse and Naples.

Go back a century, to the time of the Manitoba Schools issue, and you will find the same thing.  We had pre-Confederation "Irish and Dogs not allowed", "Bohunks, out!", "Polacks, out!".  We had so much anti-German prejudice that Berlin, Ontario had to change its name to Kitchener.  We kept Chinese and East Indians out by law.  We kept Jews from buying houses, practicing law, playing golf ...
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You know what?
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Canada has one of the most mixed, culturally diverse and inter-woven populations in the entire world.  It has made our society rich and resilient.  I work with people from two dozen different countries, everyday, and where they come from doesn't matter to anybody.  We see people for the individuals they are.