Good one...thanks for this. Especially around the notion of "mass immigration."
It's fascinating to compare--and contrast--21st century with early 20th century.  Just 100 years back...

B.C. was "flooded" with Asian immigrants in a period of 5 years. Many people were up in arms.  The numbers were frightening. The province attempted to usurp the federal government and ban any more from coming--Ottawa laughed and slapped down the legislation. Five years later, in 1913, the number of Asian immigrants in B.C. stood at 28,000--foreign born and Canadian born.  However, most of them lived in Vancouver, a city with a population of just 120,847. ANY different-looking group of over 20,000 was highly visible. 

Truth: in 1913, that 28,000 STILL represented less than 1% of the province's entire population.