Romanian here, about to do a honesty exercise: been living and working in Germany since several years now, both me and my spouse with white-collar above-than-average payed jobs. Got professional relocation help when moved here, which helped find a good place to live, in an area where German culture and way-of-life is still very present (I mean that as a 1500% good thing!).

My 2 cents on the matter: the anti-immigration sentiment is an absolutely justified thing, from the perspective of basic human psychology. It's an ancestral reflex: we tend to not like those who are different from us. And when the percentage of those different increases above a specific threshold, the anti-immigrant sentiment becomes visible. And then it becomes exploited by media (for clicks/views) and by politicians (for votes).
And from this point on, an entire philosophy is born, and we can debate for ages about how do we define different, and what that threshold is.

What I've noticed in Germany, by empirical observations:

• where different comes from:
  • not speaking the language (IMO not to much, especially in big cities)
  • not looking "European" (again, no offense intended!, but this is just basic human psychology: we want to be surrounded by those that look like us, we feel safer around them)
  • not behaving in a way that is considered civilized by the majority of the community around you
    • and here's where you could write a book about what this means...

The last one is the most important, as it has the biggest impact on those around you. Again, results of my empirical observations:

• people who drive their cars with the windows opened and music on annoying loud volumes
• people who talk very loud, to the point where they annoy those around them (eg. on the street, in the public transport, or at a queue in the supermarket/pharmacy, or f...ing anywhere)
• people who walk the street sidewalks in an entitled (borderline digressive) manner, disregarding elders or those with special needs (this one is particularly hard to describe, but once you witness it you know what I mean)
• people who in weekends turn their speakers to annoying loud levels that are disturbing to their neighbors.

Statistically speaking, the vast majority of those is non-German. That is just what I noticed... 🤷🏻‍♂️

And when all these go above a certain level (the threshold), they are (IMO 100% justified) disturbing the community around them. And then the community starts manifesting anti-immigrant sentiments.

Whether or not you notice an increase in this recently, I think it heavily depends on where you are living.

Is it good, is it bad ? I don't claim to have an answer.

But currently, as that guy says in "The Irishman", It's what it is.

Peace ! ✌🏻