He was arrested by the British Mandate government upon coming back from a trip to Egypt after he was tipped by the Austrian Jewish agent Sarah Herinson as affiliated with the Arab Resistance at the time before releasing him a few months later.
As the years 1918 to 1922 witnessed the rising of the Arab National Movement in Jerusalem, Jaffa, Haifa, Akka and Nablus, Kamil joined Amin al-Husseini, his brother Fakhri al-Husseini, Ishaaq Darweesh, Ibrahim Darweesh, Jamal al-Husayni, Aref al-Aref, and Sheikh Hassan Abu Al-So’oud in establishing the Arab Club.
Al Sabah was the media front of the Arab Palestinian conference and succeeded the newspaper Suriyya al-Janubiyya.
Al Sabah (Arabic, "Morning") was published until 1923, when Kamel Budeiri left Jerusalem and crossed to Transjordan to meet the Saudi princes of Najd and update them on the latest developments in Jerusalem and unify positions on rejecting the Balfour Declaration and the Zionist intentions of establishing a Jewish state in Palestine.
He took a Bedouin guide from the Howeitat tribe to escort him through the Jordanian deserts to Najd, where he was assassinated in what seems to be part of the tribal conflict between the Hashemites and the Saudis during the Arab Revolt.