Remember that Poland did largest immigration experiment in Europe's history in late Middle Ages and that was a failure. After 500 hundred years these migrants where still living in ghettos, speaking foreign language and preserving their religion. It is pretty much taken as a fact by Polish people that cultural and religious differences cannot be bridged in 500 years.

Edit: Although I do agree that there might be an effect similar to this, I think it was also present in Slovenia versus other Yugoslavian people. I wonder how much it has to do with the perception of wealth directly, and feeling threatened by "inferior" culture - there's probably a correlation, in addition a poor society is percieved as more likely to immigrate in larger numbers.

From polls I've seen, I think most of the UK is pro-immigration. The disagreement is over uncontrolled immigration, which is a bit different.

Edit - I'm also in London, and have definitely heard people complaining about rich Saudis buying everything up. (And rich Russians before that.) I suspect there's a useful comparison to be made with US anxieties wrt Japanese investment back in the 90s.

Considering the amount of distaste for anything Saudi in most people I see across several countries around here I very much dispute that.

I think you need the people to be a similar economic makeup as the destination country, otherwise all the rich people buy you all out and everything is too expensive or all of the poor people act like an influx of 'criminals' who screw up everything according to the perceptions of the receiving populace.

Plenty of people would complain more loudly about Saudi sheikhs than anyone else. There are a lot of people who want to live their lives without having their lives disrupted by large influxes of people with a completely different culture, and it has nothing to do with wealth. The populist backlash you have seen across the globe recently is largely a result of these people having nowhere else to go politically, because the neoliberal ruling class of the last 30 years refuses to acknowledge their legitimate concerns. Hopefully cooler heads will prevail, and we in the western world will be able to have an open and legitimate debate about immigration and the right of a nation to decide who (and how many) people from starkly different cultures should be imported. Or the self-righteous can just keep calling them racists and bigots for voicing their legitimate concerns and stand by as the next wave of Trumps and Brexits roll across the western world.

That's not what happens at all. You've never been to Marbella, have you? I watched a TV show some months ago about how nicely they behave there. Huge tips, very discreet people, lavish mansions with many jobs for the service... Now in Spain there's a heated discussion about selling weapons to Arabia (about murder of Khasoggi) since our shipyards are a vital source of jobs near my hometown.