the Taliban called their 20% tax on truckloads of opium "zakat", which is traditionally limited to 2.5% of the zakat-payers' disposable income (or wealth). The Taliban have been compared to the 7th-century Kharijites who developed extreme doctrines which set them apart from both mainstream Sunni and Shiʿa Muslims. The Kharijites were particularly noted for adopting a radical approach to takfir, whereby they declared that other Muslims were unbelievers and deemed them worthy of death. In particular, the Taliban have been accused of takfir towards Shia. After the August 1998 slaughter of 8,000 mostly Shia Hazara non-combatants in Mazar-i-Sharif, Mullah Niazi, the Taliban commander of the attack and the new governor of Mazar, declared from Mazar's central mosque: Last year you rebelled against us and killed us. From all your homes you shot at us. Now we are here to deal with you. The Hazaras are not Muslims and now have to kill Hazaras. You either accept to be Muslims or leave Afghanistan. Wherever you go we will catch you. If you go up we will pull you down by your feet; if you hide below, we will pull you up by your hair.Carter Malkasian, in one of the first comprehensive historical works on the Afghan war, argues that the Taliban are oversimplified in most portrayals. While Malkasian thinks that "oppressive" remains the best word to describe them, he points out that the Taliban managed to do what multiple governments and political players failed to: bring order and unity to the "ungovernable land". The Taliban curbed the atrocities and excesses of the Warlord period of the civil war from 19921996. Malkasian further argues that the Taliban's imposing of Islamic ideals upon the Afghan tribal system was innovative and a key reason for their success and durability. Given that traditional sources of authority had been shown to be weak in the long period of civil war, only religion had proved strong in Afghanistan. In a period of 40 years of constant conflict, the traditionalist Islam of the Taliban proved to be far more stable, even if the order they brought was "an impoverished peace". Condemned practices The Taliban have been internationally condemned for their harsh enforcement of their interpretation of Islamic Sharia law, which has resulted in their brutal treatment of many Afghans. During their rule from 1996 to 2001, the Taliban enforced a strict interpretation of Sharia, or Islamic law. The