Fact: The communist Khmer Rouge in Cambodia under Pol Pot killed nearly 1/4 of Cambodia's population, or roughly 2 million out of 8 million people.

The regime forcibly emptied cities, relocated people to collective farms/labor camps, abolished money, and forced everyone to wear the same black clothing.

The regime even killed people who wore glasses or spoke more than one language, on suspicion of being "intellectuals" or "counter-revolutionaries."

People were mass murdered in the Killing Fields, often with pick-axes to save bullets.

The regime declared that all old culture and traditions, including Christianity and other religions, must be destroyed to form a socialist agrarian utopia, and declared the beginning of "Year Zero."

https://en.wikipedia.org/wiki/Cambodian_genocide