Look at those German 'ubermensch' protesting in front of Woolworths in 1933. That's an example of false pride.
Germany has changed a hell lot since the end of Warl War II as a result of that war and as a result of the policies of the Allied Forces introduced to the occupied country. Of course, there have been people who prefer not to, as in any nation. But you seem to dwell on stereotypes which are still widespread in Poland being the aftermath of the war. I may tell you about my one week long visit to Berlin this year after which my wife who is typically pro-PiS, anti-immigrant and has some not particularly pleasant experiences from her trips to the former DDR could only observe that people in Berlin were "very polite". Neither she nor myself noticed signs of Germany heading in the direction of a "muslim state" except perhaps for a quite a number of dark-skinned people around the district of Charlottenburg in the vicinty of which we stayed.
I could recommend to you reading a very good and a recent book "
Deutsche nasz. Reportaże berlińskie" by Ewa Wanat. The author comes across a wide spectrum of subjects on contemporary Germany, ranging from the Protests of 1968 (a short, but excellent analysis of that in Germany in the context of the WWII) through the immigration of the 1960s to the wave of the most recent "Merkel" immigration. Some very interesting interviews with native Germans, Muslim immigrants, Polish immigrants in the book as well. Also, the author being neither German nor Muslim nor leftist nor rightist presents a very balanced views on the variety of issues discussed in the book. She makes an interesting point saying that the Germans have created immigrant ghettos in Berlin themselves by allowing them to settle in certain districts of the city only. Also, Ewa Wanat describes deportations of well-settled immigrants from Germany,too. She does not save the Germans critical remarks as well.
Thus, having read this book, you may end up enlighting yourself on many aspects of life in contemporary Germany in the contezt of immigration and may perhaps stop singing
ad nauseam your highly stereotyping tunes describing Germans as if they were some strange species standing with one leg in the 1930s and in some Baghdad califat with the other.