I think it's inevitable this will happen.
That being said, you really have to talk about the refugee system, and then other kinds of immigration.
Both are important but the refugee system is where there is a huge problem on the horizon that is not just up to individual countries to deal with, and the systems and many regulations are essentially international.But it's a system that was crafted at a very different time, and it's simply inadequate to manage what's coming. Part of the reason (not the only reason) it's those small countries that are responding first is that in such a small place it's clear that it would be possible to be overwhelmed very easily. No one can fool themselves that they can absorb so many people, either in terms of the infrastructure of social democracy, or in terms of maintaining a distinct social fabric.
The majority of people IMO see this and want to try and find solutions, but it's extremely difficult. My sense is that they are going to end up being an investment in creating stability in people's own places.But then I can't really see that as being adequately effective either.
But certain sections of the progressive left seem to want to make it impossible to even get to a place where such discussions can happen, because they are so convinced that the answer is just, let people go where they want, the west should support them anyway as a kind of penance. And that will end up with people moving more right, politically, in terms of voting choices. This is one of those areas where you get a funny historical blindness, as it was at one time widely understood that the kinds of infrastructure you find in social democracies requires a relatively small, stable population with controls on immigration.
The other issue of course is managing declining population. One thing that will have to happen is a better approach to getting our own workers into the jobs we need, when they maybe aren't considered the most glamorous (farm work for example), and also training people properly rather than relying on poaching trained people from other countries to work cheap (or not so cheap.). Mechanization may come into this somewhat, though my intuition is that will be a mixed blessing.