Why do people come to Germany and complain about discrimination when they speak in English?

Well, the English female royals like(d) to marry German princes ...
(The House of Hanover actually was in German Chur-Braunschweig-Lüneburg, shortened Braunschweig-Lüneburg, in English Elector-Brunswick-Luneburg)

They had to marry Protestants. In my opinion, it was expedient, since the German prince might not likely turn into a Trojan Horse, so to speak. Perhaps, they were willing to be Anglicized? Not so much perhaps, for other country's Protestant princes?

The House of Saxe-Coburg-Gotha was known for it's 'marriage politics': they are not only 'present' in England, but in the royal houses of Belgium, Portugal, Bulgaria, Sweden as well - some very strong Catholic dynasties , not all Anglicans, I think ...

Empress Eadgyth's bones "are the oldest surviving remains of an English royal burial" it as said. But she was the wife of Otto I, Holy Roman Emperor...

We've been today to Hannover, visted the parks there. They've a mausoleum with some of Queen Lizzie's great... grandparents (including some English royals) buried in it.