From the perspective of world history, human development is actually the law of the jungle, especially since there are thousands of peoples in the world, and in general, excellent peoples are stronger and more respected. The Most Typical European Anglo-Saxon Nation, as well as the Asian Chinese Nation, are the most outstanding peoples in the world, so they have great influence in the world. But there are exceptions to this, the most typical is the Jews, Jews are very smart, tough, but Europeans do not like Jews, and even call them the spreaders of the virus. For this reason, in fact, many people still do not understand, during the Black Death, why only European Jews had a low mortality rate. In fact, there is only one root cause.

The European plague that broke out in the mid-13th century, also known as the Black Death, is still fresh in Europe's memory, and is known as the hellish moment of Europe. Because the Black Death lasted for 6 years, one-third of the Population of Europe died, the whole of Europe was covered with corpses, and many cities and villages were devastated.
In the face of this Black Death, the major peoples of Europe suffered heavy losses. And the death toll is very large, whether it is the Romans, or the French, or the Anglo-Saxons, or the Germans, no matter which ethnic group, as long as it belongs to Europe, basically all die a lot of deaths.
The only exception to this is the Jews. In the face of the Black Death, only the Jews had a very low mortality rate, and the Jews basically remained unchanged and survived the Black Death. For this, the Europeans at that time believed that the Jews had magic, and blamed the Black Death on the Jews, believing that the Jews brought the Black Death and the plague, causing Europe to suffer heavy losses, but they had nothing to lose, and it was precisely because of this that the Jews were even more hated and excluded by Europe.
This is the main reason why Jews have been hated and attacked by Europe and the West. So now the mystery is, during the Black Death, why did Europeans die so badly, but the Jewish mortality rate was very low? In fact, there is only one fundamental reason, that is, "Jewish characteristics."
The Jews consider themselves to be God's chosen people, so they are particularly closed and united, embodied in life, and there is also a big difference, that is, the universal love of cleanliness. In medieval Europe, the cities were dirty and messy, full of feces and bacteria, so that the plague was prevalent. The Jews are more hygienic and usually harsh on themselves, so they can be left alone in the spread of the plague.
Not only that, but Jews are relatively closed, have their own small groups, and basically have no contact with the outside world, which is why it also reduces the chance of Infection among Jews. So in the end the Jewish character saved the Jews, because they loved cleanliness and were relatively closed, so that during the Black Death, the mortality rate was very low. It laid a solid foundation for the current Jews to have a population of 20 million, otherwise, during the Black Death, the Jews would have died almost as long, so hygiene is very important.
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Reference: Modern and Contemporary World History.