More Immigration-friendly Policies in a Country of Your Choice

As the title suggests, could you give ideas how a country of your choice could be made more open to immigration than it actually was in our timeline. The POD does not matter, the only condition is that these immigration-friendly politics come into effect before 1975.
 
No Exclusion Acts in the US. For that you'd need a labor movement that doesn't demonize Asians. You'd need a union or perhaps simply a charismatic leader who can organize across racial lines the way the Knights of Labor did. That'd eventually lead to a west coast that more closely resembles Hawaii in its ethnic makeup.
 
Maybe South Africa relaxes their immigration laws at the conclusion of WWII in order to draw educated Germans and other Europeans to their country. Could see a larger white population in South Africa, maybe a liberal bent. Also, if they can gather enough former German scientists, they could become quite the power both economically and technologically.
 
In Canada, PM Mackenzie King and the Deputy Minister for Immigration (F.C. Blair) drafted immigration policies that can be summed up in the following phrase: White, Northwest European, Middle Class Only. Enoch Powell's dream come true. Earliest POD would be Pearson winning earlier. Why? Because Dief, like his German-Canadian predecessor Mackenzie King (Berlin, aka Kitchener), was not known for tolerant racial views. Among other things, he associated with the SK KKK and was virulently anti-Catholic.
 
In Canada, PM Mackenzie King and the Deputy Minister for Immigration (F.C. Blair) drafted immigration policies that can be summed up in the following phrase: White, Northwest European, Middle Class Only. Enoch Powell's dream come true. Earliest POD would be Pearson winning earlier. Why? Because Dief, like his German-Canadian predecessor Mackenzie King (Berlin, aka Kitchener), was not known for tolerant racial views. Among other things, he associated with the SK KKK and was virulently anti-Catholic.
Or if Mackenzie King isn't chosen leader, but rather someone who continues Laurier/Sifton's immigration policies. Peasants in sheepskin coats...
 
That would be the interim leader Daniel McKenzie, who was an isolationist, a Commonwealther in FP, and generally to the right of King. After Laurier's death, they couldn't pick someone from the Anglo wing of the party, since they'd all crossed the floor to form the Unionist coalition in 1917. There's no way to remove King from the leadership once he's in office, because in terms of tactics/strategy, he's only rivalled by Harold Wilson and Karl Rove.
 
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