Jerusalem, home of Masjid al-Aqṣā — the first qiblah and the place mentioned in the Quran as the destination of the Night Journey (Quran 17:1) — fell to the Crusaders in 492 AH (1099 CE) amid great slaughter. In 583 AH (1187 CE) Ṣalāḥ ad-Dīn al-Ayyūbī decisively defeated the Crusader army at the Battle of Ḥaṭṭīn and retook the city, and unlike the earlier conquest he granted safety and safe passage to its inhabitants. He is remembered for reviving Sunni orthodoxy, uniting Egypt and Syria under one authority, and his justice toward friend and foe alike. Though the Crusades continued for further generations, the liberation of al-Quds marked the turning of the tide.
Evidence — the daleel
On deen2u
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.