People's issues are more about quality as opposed to quantity. When you have both quality (or lack of) and quantity, then it's not surprising it's not exactly popular. Put another way, just who are the influx? Do they cause any problems?
Put another way - and this is really going off on a tangent. Back in the late 80's there were negotiations on the future of Hong Kong.
Thatcher's government were scared of maybe upwards of a million (maybe even two) Chinese coming to Britain, and resisted calls for these British citizens in all but status to be given the right to come here if they so wished to. Result was they refused this, despite moral and other considerations suggesting this was a departure from what would be expected.
We will never know, but I'd be willing to bet, if instead of some of the incomers, we had a large influx of the eventual tens of thousands of British Chinese coming in, then not only would people not have cared if a couple of streets in each city had become Chinatown, and plenty of oriental supermarkets had opened, but they'd have come to be regarded as welcome additions, especially when the figures showed how many businesses had opened and how parts of cities had been regenerated. Many instead went to places like Toronto, the example of what would have happened can be seen there.
Again, it's who is settling here