Enoch Powell said this quote

“ The other dangerous delusion from which those who are wilfully or otherwise blind to realities suffer, is summed up in the word integration. To be integrated into a population means to become for all practical purposes indistinguishable from its other members.Now, at all times, where there are marked physical differences, especially of colour, integration is difficult though, over a period, not impossible. There are among the Commonwealth immigrants who have come to live here in the last fifteen years or so, many thousands whose wish and purpose is to be integrated and whose every thought and endeavour is bent in that direction.But to imagine that such a thing enters the heads of a great and growing majority of immigrants and their descendants is a ludicrous misconception, and a dangerous one. ”