Mahmoud Hussein Husari (Abu Al-Affau) was born in Umm Al-Fahm in 1925. He worked in Jaffa in the early 1940s and then in Haifa, and then joined the Communist Party. After the 1948 Nakba, he returned to Umm al-Fahm, and there he established, with Mohammad Shreidi and his brother Ibrahim, the first communist circle in Umm al-Fahm. He held the position of deputy head of the Umm al-Fahm Local Council and had a decisive role in the Council's stand against land confiscation in 1976. He was persecuted by the Israeli Occupation, as a result of which he spent several years in prison before he passed away in 1985.

The Mahmoud Housary Collection contains documents relating to his activism in the Communist Party and Arab towns of the 1948 Occupied Palestinian Territory, especially in Umm al-Fahm and Taybe, including a booklet on Marxist-Leninist theory, an agenda notebook dating back to 1967, a notebook of a member of the General Federation of Israeli Workers "Histadrut", and correspondence from the Shefa-Amr and Umm al-Fahm Councils.