被当时的人形容为不负责任及轻率的西顿及Beaufort十字军领主Julian de Grenier于1260年趁机劫掠贝卡地区，那里不久前被蒙古人占领。怯的不花派遣其侄（或甥）带同一支小部队去追究损失，却遭到Julian的伏击及杀害。怯的不花于是突袭西顿城，摧毁城墙及杀害基督徒，而城堡则据说未有被攻下。[14][15]
最常被引用的对此事的研究见于由Sylvia Schein博士于1979年发表的《Gesta Dei per Mongolos》一文，她在该文结论说“圣地被宣称的收复根本没有发生过”。[36][37]不过Schein在她1991年的书中加入一个简短的脚注，说蒙古人占领耶路撒冷“已获得证实”，因为有记载说他们于1300年取走圣殿的金门，运往大马士革。[38]这是根据14世纪神父波吉邦西的尼科洛的记述，他详细描述耶路撒冷的建筑，及提到蒙古人对那门做过的事。另一学者Denys Pringle认为尼科洛的记述是说蒙古人试图毁坏、焚烧或拆走该门但不成功，当马木留克军回来后，他们用墙封堵了那门。[39][40]
Alain Demurger在他2007年的书《Les Templiers》说蒙古人攻占大马士革及耶路撒冷，[41]又说合赞的将领Mulay也于1299年－1300年“有效地出现在”耶路撒冷。[42]根据Frederic Luisetto，蒙古军“渗透入耶路撒冷及希伯仑，他们在那里进行了多次屠杀”。[43]Andrew Jotischky在《The Crusaders and the Crusader States》中以Schein的1979年文章及1991年的书去说“在短暂及大致上是象征式地占据耶路撒冷后，合赞撤返波斯”。[44]
"On 1 March Kitbuqa entered Damascus at the head of a Mongol army. With him were the King of Armenia and the Prince of Antioch. The citizens of the ancient capital of the Caliphate saw for the first time for six centuries three Christian potentates ride in triumph through their streets", Runciman, p.307
"The king of Armenia and the Prince of Antioch went to the army of the Tatars, and they all went off to take Damascus".|Gestes des Chiprois, Le Templier de Tyr. "Le roy d'Arménie et le Prince d'Antioche alèrent en l'ost des Tatars et furent à prendre Damas". Quoted in "Histoire des Croisades III", Rene Grousset, p.586
The British historian Steven Runciman believes that Nablus and Gaza were occupied, but that Jerusalem itself was not taken by the Mongols. Runciman, p.308
"Hulegu informed Louis IX that he had handed over the Holy City to the Franks already, during the brief Mongol occupation in 1260 (although, as we have seen, this is nowhere indicated in any of the Muslim sources, still less in the Frankish appeals for help to the West), and the claim was reiterated in 1274 by Abaqa's envoys.", Jackson, p.174
"It happened that some men from Sidon and Belfort gathered together, went to the Saracens' villages and fields, looted them, killed many Saracens and took others into captivity together with a great deal of livestock. A certain nephew of Kit-Bugha who resided there, taking along but few cavalry, pursued the Christians who had done these things to tell them on his uncle's behalf to leave the booty. But some of the Christians attacked and killed him and some other Tartars. When Kit-Bugha learned of this, he immediately took the city of the Sidon and destroyed most of the walls [and killed as many Christians as he found. But the people of Sidon fled to an island, and only a few were slain. oe43]. Thereafter the Tartars no longer trusted the Christians, nor the Christians the Tartars." Fleur des Histoires d'Orient, Chap. 30 （页面存档备份，存于互联网档案馆）
"When he disembarked in Acre, Edward immediately sent envoys to Abagha (…) As he (Abagha) could not commit himself to the offensive, he ordered the Mongol forces stationned in Turkey under Samaghar to attack Syria in order to relieve the Crusaders" Jean Richard, p.446
"Edward was horrified at the state of affairs in Outremer. He knew that his own army was small, but he hoped to unite the Christians of the East into a formidable body and then to use the help of the Mongols in making an effective attack on Baibars", Runciman, p.335
"Et revindrent en Acre li message que mi sire Odouart et la Crestiente avoient envoies as Tartars por querre secors; et firent si bien la besoigne quil amenerent les Tartars et corurent toute la terre dantioche et de Halape de Haman et de La Chamele jusques a Cesaire la Grant. Et tuerent ce quil trouverent de Sarrazins", Estoire d'Eracles, Chap XIV （页面存档备份，存于互联网档案馆）
Phillips, p. 128. "Disillusionment came swiftly. Jerusalem had not been taken or even besieged; Ghazan evacuated Syria within a few weeks of its conquest probably because his horses were short of fodder. He attacked it again in 1301, and planned further campaigns for the next two years, but achieved nothing. His bitterness at the failure of the European powers to provide the military assistance he had asked for expressed itself in 1303 in yet another embassy to Philip IV and Edward I, to which Edward replied tactfully that he and Philip had been at war and could not send help."
Schein, in her 1991 book mentioned in a footnote that the Mongol capture of Jerusalem was confirmed because they had removed a gate from the Dome of the Rock, and transferred it to Damascus. "The conquest of Jerusalem by the Mongols was confirmed by Niccolo of Poggibonsi who noted (Libro d'Oltramare 1346-1350, ed. P. B. Bagatti (Jerusalem 1945), 53, 92) that the Mongols removed a gate from the Dome of the Rock and had it transferred to Damascus. Schein, 1991, p. 163
"The conquest of Jerusalem by the Mongols was confirmed by Niccolo of Poggibonsi who noted (Libro d'Oltramare 1346-1350, ed. P. B. Bagatti (Jerusalem 1945), 53, 92) that the Mongols removed a gate from the Dome of the Rock and had it transferred to Damascus. Schein, 1991, p. 163
"In December 1299, he (合赞) vanquished the Mamluks at the Second Battle of Homs and captured Damascus, and even Jerusalem", Demurger, Les Templiers, 2007, p.84
Frédéric Luisetto, p.205-206 "Troops penetrated in Jerusalem and Hebron where they committed many massacres (...) In Hebron, a cross was even raised on top of the mosque of Abraham", also p.208 "We have knowledge of the violences perpetrated in Jerusalem and Damas"
"The earliest letter was dated 19 March 1300 and addressed to Boniface VIII. Its contents suggest that it was probably written by the Doge Pietro Gradenigo (1289-1311)." - Schein, 1979, p. 814
Foltz, Richard (2000). "Religions of the Silk Road : overland trade and cultural exchange from antiquity to the fifteenth century". New York: St. Martin's Griffin. ISBN 0-312-23338-8.
Demurger, Alain. Jacques de Molay. Editions Payot&Rivages. 2007. ISBN 2228902357（法语）.
Hazard, Harry W. (editor). Volume III: The Fourteenth and Fifteenth Centuries. A History of the Crusades. Kenneth M. Setton, general editor. The University of Wisconsin Press. 1975. ISBN 0-299-06670-3.
Jackson, Peter. The Mongols and the West, 1221-1410. Longman. 2005. ISBN 0582368960.
Lebédel, Claude. Les Croisades, origines et conséquences. Editions Ouest-France. 2006. ISBN 2737341361（法语）.
Newman, Sharan. Real History Behind the Templars. Berkley Publishing Group. 2006. ISBN 978-0-425-21533-3.
Nicolle, David. The Crusades. Essential Histories. Osprey Publishing. 2001. ISBN 978-1-84176-179-4.
