Read the comments.
This is a complex subject.
I'll try to sum up thirty years of reasoning on this subject by saying this ...
Once you lose the confidence of the sweet people who made Western civilization a nice place to live, you've already lost your civilization. What follows is mere epilogue.
Without writing a couple paragraphs (I could easily do so) it is sufficient to say that when people feel so trapped between the madness of political correctness and reality that the apocalypse becomes something to actually look forward to, you have self-fulfilling conditions at work. If the Dutch middle-class starts to eagerly desire the collapse of their own society after centuries of peaceful tranquillity, that tells you that it isn't far off at all. Once the people who actually keep that society intact start abdicating, the end is very close.
I reckon similar sentiments could be found all over the UK and most of Europe. If the Europeans give up and abandon ship, will the new immigrants be able to keep the magic going that makes it such a nice place to live ... as opposed to where they came from? Is it the cosmic synergy gas exuded by the soil? Who needs'em anyhow? The streetlights, flush toilets and hydroelectric plants will just fix themselves, the same way they do in Zimbabwe.