This is not a strawman. Even if you believe that the AFD is not correct in its diagnosis of the problems, why are you saying something that is a complete lie: https://www.infomigrants.net/en/post/54441/germany-net-migra...
According to this organization which sits on the complete on opposite spectrum of the right/far-right, they write that 2.7M people immigrants moved to Germany in 2022 with a net inflow of 1.5M in a single year.
According to the same organization, today, immigrants make-up at least 20% of the German population and that's from an article from 2024 so that number is probably low. So if we extrapolate roughly 1 in 4 people living in Germany are not German.
That is exactly why the AFD is rising, people just bury their heads in the sand and pretend that there is no problem at all.
But I guess its easier to think that 44% of the inhabitants of Saxony-Anhalt are secretly Nazies than admitting that something must change. Lets continue doing that, its been working so well so far!