Дейр аль-Касси: История и население поселения.

The first part of the village name, Dayr ("monastery") suggest that the village might have had a monastery and a Christian population. However, in modern times the population was Muslim. According to the residents of the village, ancient artifacts from the Canaanite, Israelite and Roman period were unearthed in the Ottoman and British Mandate period. In the Crusader era it was known as Cassie, and in 1183 it was noted that Godfrey de Tor sold the land of the village to Joscelin III. In 1220 Jocelyn III's daughter Beatrix de Courtenay and her husband Otto von Botenlauben, Count of Henneberg, sold their land, including Cassie and the nearby Roeis (Khirbet Tell ‘er Ruwesah/Tel Rosh), to the Teutonic Knights. Remains from the Mamluk era have been found in the area.

Dayr al Qassi was incorporated into the Ottoman Empire in 1517 and it belonged to the nahiya (subdistrict) of Jira, part of the Safad Sanjak (District of Safed). In the 1596 tax records Dayr al Qassi had a population of 24 Muslim household; an estimated 132 persons. The villagers paid a fixed tax rated of 25% on a number of crops, including wheat and barley, as well as on goats and beehives; a total of 345 akçe. In the early 18th century, Dayr al Qassi was a fortified village controlled by a local sheikh (chief) named Abd al Khaliq Salih. In 1740, Sheikh Zahir al Umar, an Arab mutasallim (tax collector) from the al Zayadina clan whose strength was growing throughout the Galilee, struggled to gain control of Dayr al Qassi. Later that year, he made the village part of his domain by marrying Sheikh Salih's daughter, thereby sealing an alliance with the latter's clan. In late 1767, Zahir's son Ali of Safad requested control of Dayr al Qassi from his father after his request for Dayr Hanna was rejected. Zahir refused and the two entered into an armed conflict, which Zahir won. Nonetheless, Zahir pardoned Ali and ultimately ceded the village to him. In 1838, Deir el Kasy was noted as a Muslim village in the El Jebel district, located west of Safad. Victor Guérin visited Dayr al Qassi in 1875, and he estimated that the village had 350 Muslim inhabitants. A population list from about 1887 showed Deir el Kasy to have about 945 inhabitants, all Muslims.

At the time of the 1922 census of Palestine conducted by the British Mandate, Dair Wal Qasi had a population of 663, all Muslims, increasing in the 1931 census, when Deir el Qasi had a population of 865, still all Muslims, living in a total of 169 houses. Later, Dayr al Qassi was mostly Muslim but had a large Palestinian Christian minority. According to the 1945 census it had 1,250 inhabitants; 370 Christians and 880 Muslims. Together with the two villages of Fassuta (existent) and al Mansura, the population was 2,300 and their total land area was 34,011 dunums. 1,607 dunams were plantations and irrigable land, 6,475 used for cereals, while 247 dunams were built up (urban) land.

During the 1948 Arab Israeli War Dayr al Qassi was defended by the Arab Liberation Army but the village was occupied by the Israeli Army during its offensive Operation Hiram on October 30, 1948. In December, 1948, there was a suggestion of sending new Jewish immigrants to settle Al Bassa, Dayr al Qassi and Tarshiha, but Cisling objected to sending military untrained new immigrants there. However, in January, 1949, the Cabinet voted to "encourage introducing ‘olim into all the abandoned villages in the Galilee". The village's residents were (again) expelled on 27 May 1949 and most migrated north into Lebanon. Elkosh was established in 1949, and occupies part of the village site. Netu'a, founded in 1966, Mattat, founded in 1979 and Abirim, founded in 1980, are also on village land. Netu'a is near the neighboring village of al Mansura. In 2000, a book about the village history was published by Ibrahim Khalil Uthman.