There is probably no such thing as "human races" (just one race - because all humans can interbreed with each other).
And certainly for example Poles, Jews, etc. are not "separate races", in genetic and biological terms.
Jews actually had historically lived in many different and distant parts of the world for centuries, and genetically Jews from one region have nothing to do with Jews from another region - they considerably differ in look, because they lived in different climates, intermarried with different locals, etc.
However, there is such thing like cultural background and upbringing / education, which is influencing people's lifes.
Jews for example are people who continue some very old cultural traditions, they are a well-organized and well-established community with their long traditions and inter-Jewish solidarity. They put emphasize on some things in life, like education, business, etc. This is why many Jews are so successful. They learned all of this during the Diaspora, as before the Roman conquest they were rather not very "enlightened" peoples, compared to many other Ancient civilizations.
Some of Orthodox Jews were and still are racist towards other peoples, treating "the goys" as inferior peoples, sent by God to serve the "chosen nation".
