:Please provide a reliable source to support the claim that Edwin Franciszek Kozłowski is a "nationalist". If you cannot provide such a source then please remove this attack on this living person, per Wikipedia's biography of living person's policy. As far as I can tell from you comment it looks like you just decided that Kozlowski MUST BE a nationalist because he holds a view which you happen to disagree with. 
 :As far as the 'important Polish element" in Königsberg" - yes there was one. It was a center of Polish Lutheranism. It was a center of Polish printing and culture. The city was briefly part of Poland outright and for several centuries the capital of its fief. In the 16th century a quarter of the city's population was composed of Polish Lutherans (so that's not even counting the Calvinists and Catholics), and that may not even have been the peak. Sources for all these claims HAVE BEEN provided (or can easily be provided). On the other hand your claims have NOT BEEN supported by any sources. 
 :The List of people from Königsberg article does need expansion. But that's a problem with THAT article, not this one. 
 :And I agree that primitive nationalism is disgusting. But it's neither Kozlowski nor the editors who simply want to write an accurate history of this multicultural city that can be seriously accused of this vice.