Allow me to ask in good faith: doesn't it end up being a plain sense of fraternity and commitment?
Ah no. Cultures have much more factors that we can observe and analyze. Just like different people have radically different traits the same patterns can be observed in cultures. For example Japanese culture is characterized by shyness, being introvert, and avoiding giving direct answers. Israeli Jewish culture is the complete opposite of that. There is too much to analyze about what makes a culture, and what are the traits of a culture to cover on line. Suffice to say I consider my native culture to be unlike any other I encountered or communicate with. There are some similar traits found in Italian, Spanish and other Mediterranean or Levantine cultures but not enough to confine Jewish culture to their structures of civilization. For example, both Israelis and other Levantine cultures are likely to be outspoken in daily communication, however in Israeli culture women are just as outspoken as the men, something which definitely cannot be taken for granted in surrounding cultures. In Jewish culture parents are unyielding about their children education while other cultures around Israeli Jewish one tend to dismiss it in favor of joining common manual labor prior to graduating high school.
Even the fact that Jews tend to be more supportive of each other and have a tendency to not abandon each other is a cultural trait which was very noted and documented by the Romans in the Mediterranean of Antiquity, as the fight to guard and preserve each infant among the Jews was an anomaly unique to them in a Roman Empire in which infanticide and disposing of unwanted babies was a noticeable phenomenon.