While I'm sure the causes are complicated, no nation has leaned more into "diversity is our strength, we don't need a melting pot we have a salad bowl" immigration insanity than Canada.
It has the highest foreign-born share of the population in the entire G7 and its living standards have stagnated.
What happened in Canada will be studied by many historians and economists as the prime example of self-destruction of an otherwise prosperous nation after blindly following left ideology.