The Hazara are still around in Afghanistan, in numbers ranging from 3m to 5m. https://en.wikipedia.org/wiki/Hazaras The Taliban aren’t unique, historically-speaking, in conducting exemplary massacres, either within Islam, Afghanistan or even the world at large. I suspect the Deir Yassin massacre, inadvertent as it was, https://en.wikipedia.org/wiki/Deir_Yassin_massacre was instrumental in getting large numbers of Palestinian Arabs to leave Israel, sparing it even bigger demographic problems than it embraced when it retook the Gaza Strip and the West Bank in 1967. It was part of the success of the Korean units in Vietnam - they massacred the civilian supporters of the Vietcong in areas that they patrolled. https://en.wikipedia.org/wiki/South_Korea_in_the_Vietnam_War
People conduct exemplary massacres not because they’re blood drinkers, although there are scattered individuals who get a charge out of it. They do it because they value their men more than the lives of any party that threatens them, including those of the civilians who feed and house the enemy. That was the rationale behind the city bombings conducted by the Allies against Japan and Germany during WWII. It’s also pretty much a requirement for rapid victories against enemy guerrillas.
Here’s an excerpt from Quora about what Chinese forces did against the Vietnamese civilian supporters of the militia during their invasion of Vietnam in 1979, killing an estimated 100K civilians in a matter of weeks:
https://www.historynet.com/war-of-the-dragons-the-sino-vietnamese-war-1979.htm
Genghis Khan, probably the greatest conquerer ever, never had a problem with guerilla warfare, even though the lands he conquered included Afghanistan. Why? Because his army simply slaughter all civilians, including their babies, who dare to fight against them.
In the Vietnam war, the Americans struggled against the Vietcongs. When China fought Vietnam, China simply romped through North Vietnam (north of Hanoi), transport removable factories/infrastructure back to China while destroying those that they cannot bring back. One crack Vietnamese division that was rushed back from Cambodia wisely decided to settle into prepared defensive positions near Hanoi instead of reinforcing the surrounded troops north of Hanoi. Why didn’t China has problem with Vietcong guerilla fighters?
When I first visited China in the 1990s, a retired veteran bitterly told me that his Major was killed by a ~6 year old Vietnamese kid holding a secret pistol when he was giving out food to the kid. Apparently, this is not an isolated incident. Very soon, they enacted Genghis Khan’s strategy. North Vietnamese villagers encountered were simply labeled as “civilian militia”, treated as combatants and showed no mercy. PLA never encounter anymore guerilla problems because there were no civilians left to provide the guerilla with information, shelter and food!
In the 1980s, there is no internet and no international reporter who has access to report on this. Chinese body counts, which included “civilian militia combatants”, concluded that enemy casualties were in excess of 10 times PLA losses.]
Rome finally dealt with Carthage in such a way that they had no further trouble with Carthage.