Do Jews and ordinary Europeans have obvious physical characteristics?

Most Jews are forced to live in a "separate capital", and they travel with signs on their arms or other national characteristics. During World War II, Hitler should have conducted a very strict census in order to kill Jews. It is said that he set a standard at that time, and three generations of Jews were considered Jews. As for appearance, just look at people in the Middle East now. Although the appearance has changed after mixed marriage, the general direction is still different.