Muslims in defence of Shaykh Abu Hamzah al Masri

Ibn Hajar Al-Haithami said (Tuhfah Al-Muhtaj 9/237) said:

If the enemy captures a single Muslim, it becomes wajib (obligatory) on every one who has the ability, to rush to their rescue (even without seeking anyone’s permission). It is apparent that it is compulsory on everyone, similar to the situation where the enemy invades our land. Moreover, saving our brothers is of a higher priority, as the sanctity of a Muslim is greater (than the sanctity of a State).