Islam started in around 600AD rather than in 1000AD, the first date mentioned in the article. Studying history will find two violent nomadic tribes who took over Islam & commenced the heavy violence: (i) Turks; & (i) Mongols. These tribes caused as much bloodshed to Muslims. Many of these Mongols were Buddhists or educated in Buddhism. The Islamic Empire was the pinnacle of world civilization & wealth, which is why it was a prize for many violent plunderers.
The Kara-Khanid Khanate (Persian: آل افراسیاب, translit. Āl-i Afrāsiyāb, lit. 'House of Afrisyab') was a Turkic dynasty that ruled in Transoxania in Central Asia, ruled by a dynasty known in literature as the Karakhanids (also spelt Qarakhanids) or Ilek Khanids. Both the dynastic names of Karakhanids and Ilek Khanids refer to royal titles with Kara Kağan being the most important Turkish title up till the end of the dynasty.
The Khanate conquered Transoxania in Central Asia and ruled it between 999–1211. Their arrival in Transoxania signaled a definitive shift from Iranian to Turkic predominance in Central Asia, yet the Kara-khanids gradually assimilated the Perso-Arab Muslim culture, while retaining some of their native Turkish culture.
https://en.wikipedia.org/wiki/Kara-Khan ... ate#Origin
Mongol invasions and conquests took place throughout the 13th century, resulting in the vast Mongol Empire, which by 1300 covered much of Asia and Eastern Europe. Historians[which?] regard the destruction under the Mongol Empire as results of some of the deadliest conflicts in human history. In addition, Mongol expeditions may have brought the bubonic plague along with them, spreading it across much of Asia and Europe and helping cause massive loss of life in the Black Death of the 14th century.
Large areas of Islamic Central Asia and northeastern Iran were seriously depopulated, as every city or town that resisted the Mongols was subject to destruction. Each soldier was required to execute a certain number of persons, with the number varying according to circumstances. For example, after the conquest of Urgench, each Mongol warrior – in an army group that might have consisted of two tumens (units of 10,000) – was required to execute 24 people.
https://en.wikipedia.org/wiki/Mongol_in ... ntral_Asia