It has some relation - Jewish communities tend to be quite tight. I work with a Jew runing a consultancy and a large amount of the workload comes from his commu

It has some relation - Jewish communities tend to be quite tight. I work with a Jew runing a consultancy and a large amount of the workload comes from his community connections; there is a level of trust - especially regarding money (I know that is a stereotype but it is true) - established by the common religion.