I don't really know how else to explain it. But when you see an article like "White people need to stop picking up litter: here's why that's racist" and it's written by someone named "Anna Scheissefrisser" and despite the fact that the name is a German compound noun, there's something off about it, and you look it up and sure enough, "Early life: Anna Scheissefrisser was born to an American Jewish family..."
And it's confirmed. Christian German names have a different feel than Jewish names, but why?
So they could blend in, hence why they created names that sound German.