You’re the completely ignorant one.
The destruction of the city of Damour is only one of the links of the genocide of Lebanese Christians, carried out by local Muslims and Druze, who were later joined by Palestinian Palestinian Arabs, and then by pro-Iranian Shiites.
USSR citizens could not find out about it from the Soviet press, their country supported Arafat. Westerners have heard little about this, because the liberal press has little interest in the suffering of non-Muslims.
However, everyone learned about the revenge of Christians in Sabra and Shatila. The Soviet and Western press instantly turned this event into the banner of the struggle against Israel and the melting Christian community in Lebanon.
Damour is located in 20 km. south of Beirut, in the foothills of Lebanon at the highway Sidon - Beirut. On the other side of the highway is the sea coast. There were 25000 Christians in the city, there were five churches, three chapels, seven schools and one hospital, which also served Muslims from neighboring villages.