Short answers, pulled from the story.
Persecution of Buddhists has encompassed unwarranted arrest, imprisonment, torture, execution, and the destruction of temples, monasteries, and sacred manuscripts. It has also included the confiscation of property, the closure of centers of learning, and forced conversion. These acts have been carried out by governments, religious authorities, and armed groups across nearly two thousand years.
Emperor Wuzong, who reigned from 814 to 846 CE, closed many Buddhist shrines, seized their assets, and sent monks and nuns back to lay life. He was motivated partly by a financial crisis and partly by his Taoist belief that Buddhism was a foreign religion harmful to Chinese society. His purge also nearly eradicated Zoroastrianism and Manichaeism in China.
Around 1006, the Karakhanid leader Yusuf Qadir Khan conquered the Iranic Saka Buddhist Kingdom of Khotan, ending its existence as an independent state. The conflict had begun when the Karakhanid ruler Satuq Bughra Khan converted to Islam in 966. The Japanese scholar Takao Moriyasu described the war as a jihad.
Between 1980 and 1995, Bangladesh Army soldiers and Muslim settlers committed at least 13 major massacres against indigenous Buddhist people in the Chittagong Hill Tracts. The Kaukhali massacre of the 25th of March 1980 killed an estimated 300 Chakma and Marma Buddhists; the Logang massacre of the 10th of April 1992 killed more than 500 people. No military personnel or settler was ever tried for any of these killings.
Twenty-five thousand Buddhist monks were massacred by the Khmer Rouge, which ruled Cambodia from 1975 to 1979. A third of Cambodia's monasteries were destroyed during this period, along with Buddhist texts and artwork. Pol Pot considered Buddhism a decadent affectation and sought to erase its presence in the country.
The Rana government of Nepal deported Buddhist monks in 1926 and again in 1944 because it viewed their activities as a political threat. The monks, all of whom were Newars, were reviving Theravada Buddhism, which had disappeared from Nepal more than five hundred years earlier. The regime also objected to their promotion of Nepal Bhasa, the Newar mother tongue.