the belonging to a social group that has a common national or cultural tradition
Because Jews belong to a social group that shares religious and cultural traditions, they are also considered an ethnicity.
Because Jewish ancestry can be traced and their are genetic characteristics, it can also be considered a race.
The main connection between Jews is their religion, and this can include members of a variety of races.
Many religious Jews are also historical scholars who debate ethical questions brought up in their sacred texts.
Watch this entertaining video about the difference between race and ethnicity.