The massacre did not emerge from nowhere. During the Soviet-Afghan War in the late 1970s and early 1980s, an estimated six million Afghan refugees poured into Pakistan under General Zia-ul-Haq's Islamization program. Many settled in urban centers including Karachi, congregating in informal settlements on the city's outskirts at places like Sohrab Goth. The refugees brought with them what came to be called the 'Kalashnikov culture' -- a flood of automatic weapons and heroin that transformed a previously deweaponized country. Pakistan's drug-using population surged past one million in the early 1980s. The AK-47, cheap and abundant, became a tool of territorial control.

The influx reshaped Karachi's informal housing market. Pashtun entrepreneurs gained influence in real estate, some backed by drug and arms money. As Muhajir and Punjabi control weakened, territorial demarcation along ethnic lines intensified, particularly in and around Orangi. In April 1985, Karachi erupted in its first major ethnic riot, killing at least a hundred people when Muhajir and Bihari basti dwellers clashed with Pashtun gunmen near Banaras Chowk. Days later, the death of schoolgirl Bushra Zaidi -- struck by a minibus while jumping off a moving bus near Sir Syed Girls College in Nazimabad -- ignited further violence. Security forces responded with an anti-encroachment operation at Sohrab Goth, destroying houses with bulldozers. Some reports suggest police first disarmed Muhajir neighborhoods of weapons kept for self-defense.

The December 1986 attack on Qasba and Aligarh colonies and Sector 1-D of Orangi Town was perceived as a revenge killing, though who precisely organized it remained disputed. What was not disputed was the brutality. Armed men poured down from higher ground, exploiting the geographic vulnerability of the colonies below. Kerosene-fueled fires consumed homes that were built close together, offering no buffer against the flames. Hundreds were wounded in addition to those killed. The massacre crystallized Muhajir political consciousness in a way that years of simmering tension had not.

The Qasba-Aligarh massacre became a foundational grievance for Muhajir political movements, particularly the MQM, which had been founded just two years earlier. The violence demonstrated that ethnic communities in Karachi could be targeted with impunity, and it accelerated the city's descent into the armed political conflicts of the late 1980s and 1990s. For the survivors and the families of the dead, the massacre was not an abstract political event but a day of specific, irreversible loss -- homes reduced to ash, neighbors killed by gunfire, a community forced to reckon with the reality that the city they had come to, often as refugees themselves, offered no guarantee of safety.