" but one massacre does often result in another and so on."

ARAB CONCEPT OF REVENGE
ƒ The Arab concept of revenge is a strong
cultural force.
ƒ The Old Testament's and Qur'an's passages
that advocate "an eye for an eye" dominate
Arab culture.
ƒ The conflict continues even after the
belligerents have killed each other off, because
previously uninvolved family and/or tribal
members expand the fight seeking revenge.
https://fas.org/irp/agency/army/arabculture.pdf
(page 29)

He (tribal leader) must also uphold the main facets
of tribal values, surrounding honour ('ird or sharaf), hospitality (karama),
warriorhood (shahama) and revenge (tha'ar). In addition, a shaykh has to
project an image of strength, primarily by maintaining the tribe's status in
respect to neighbouring and potentially hostile tribes around it.
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/16871/arab_world_introduction_cultural_appreciation_booklet.pdf
(p22)