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?
Examples: Schwarz (means black), Schwartz (black, but written in older German probably), Rosental (rose + valley), Goldberg (gold + mountain), Rothschild (red in older German probably + shield), Zuckerberg (sugar + mountain).
We can still identify them to some degree, but the best way to detect them is by their fruits - their subversive, degenerate, race-mixing actions. Nazis were quite successful in finding the "bad jews", and oh boy, they found a lot of them.