What is the interpretation of: "The Jews of Banu 'Awf are a community with the believers"?

The aforementioned text is part of the Covenant document between the Prophet, peace and blessings be upon him, and the Jews in Medina. It means that the Jews of Banu 'Awf and other Jews will be with the believers in support and are obligated to contribute financially during war, not that they are among the believers. The document stipulates that both the Jews and the Muslims have their own religion, and that the Jews contribute financially with the believers as long as they are engaged in war. Some members of Arab tribes, like Banu 'Awf, became Jewish due to a mother's vow to Judaize her son if he lived.