Neither model has worked and will never work. That goes for the Canadian model of laissez-faire multiculturalism that has created mono-ethnic and mono-racial neighbourhoods in our largest cities instead of fostering integration.  The newcomer's refusal to integrate by clinging to old country values and morals is what causes cautionary distancing by the host country's citizens but this is quickly labelled as "racism" by the migrants.  All part of the master plan of destabilization, of tekiyah (“righteous deception.”, similar to the Arab belief, espoused in the Koran, that it is acceptable to lie and deceive those around you in order to bring the Infidels down) being implemented by Muslim clerics who encourage their followers to establish themselves in the West a fifth column to serve Jihad (conquest to establish the reign of Mohammed).