My city is home to about 50 thousands of Vietnamese. Decent, hardworking and smiling wonderful people. There was never any problems. They have their own organizations, associations, newspapers, launched a schools, kindergartens, have decided to try building their pagodas. They do fantastic food.
Asked how they feel in Vietnam, they respond with a laugh that as tourists on holiday.
Older generations, when asked about the young, laugh frankly and say that they are like bananas - yellow from outside, but white inside. lol
Where is our white chocolate chip cookiem against them? Simply doesn't exist, and we are friendly, helpful and tolerant. What a kurwa miracle...
Whether integration will be successful or not depends largely on immigrants. End of story.