The Netherlands doesn't have tens of millions of citizens who refuse to engage with society in any meaningful way due to certain circumstances from many generations ago.
but like, at the end of the day thinking that "multiple cultural groups" is the problem basically a coded/socially-acceptable way of saying that we can't have a social safety net because of black/hispanic people (or whatever disfavored minority/immigrant group is currently en-vogue). It always has been.
It has nothing to do with race. Roma people have continuously refused to integrate, which is perfectly fine if they don't want to, but then don't be a weight on the host society by receiving every form of financial support you can get your hands on, while being a centre for criminality, and demanding access to what a contributing member of society can access.
I have experienced roma communities first hand. They shun their own who decide to get educated. Is that the kind of societies you'd like around your kids in the 21st century ?
There must be a reason that people dislike certain societies.
The British government doesn't, but it does show the "White Gypsy/Traveller" ethnicity has 31.2% "Never worked or long-term unemployed", higher than any other group [1].
Particular types of petty crime obviously increased when travellers settled (temporarily) on some land near where I grew up. It happened every 18 months or so. However, this doesn't show up in arrest statistics, so I think it's that society is accustomed to the existing petty crime and notices the change.
[1] https://www.ethnicity-facts-figures.service.gov.uk/uk-popula...
Our string of right-wing governments haven't done much to fix that (and sometimes made it a lot worse), but it's good to see citizens step up with these sort of projects.
I still think it's a failure of the system that this is even necessary.
It did help them jumpstart their economical development by.. quite a lot tho and they have been very prudent with their money ever since.