Leaders in Europe have recognized the need for this attitude in the past, but they've acknowledged that it hasn't quite worked out [4][5]. Making the transition from a country with very long family lineages just requires a lot more convincing of the local population.
1: https://www.theatlantic.com/magazine/archive/2013/11/assimil... 2: https://www.theglobeandmail.com/news/politics/canada-near-to... 3: https://www.nytimes.com/2015/12/09/business/international/fo... 4: https://www.bbc.com/news/uk-politics-12371994 5: https://www.theguardian.com/world/2010/oct/17/angela-merkel-...