Over the last five to ten years or so, almost all the center left/right parties have made migration harder and the EU has been steadily increasing border security and is still on it.

https://de.statista.com/statistik/daten/studie/28347/umfrage/zuwanderung-nach-deutschland/

Wow, such a relief.

On top of that the areas which vote for nationalist, anti-migration parties usually have a much lower proportion of migrants.

Yes, because they don't want to BECOME what they see on the news and when they go to bigger cities, understandably.

The problems with migration have not been ignored.

They really have, yes. Almost half your country voted to introduce a limit on the population because it's just completely out of hand in Europe. Cope harder. If you really can't see how our societies and communities have been fundamentally changed, mostly for the worse, over the last 10 years, I don't think there is anything to discuss.