at Tuol Sleng prison. The Vietnamese-backed PRK administration swiftly opened the prison to visitors as the "Genocide Museum". Short argued that while Pol Pot's administration was clearly responsible for crimes against humanity, it was misleading to accuse it of genocide because it never sought to eradicate an entire population. Chandler noted that while "Cambodia's revolution" under Pol Pot produced "millions of victims", it also had some beneficiaries. Those who were empowered by the Khmer Rouge administration either "probably believed" Pol Pot's claims regarding the construction of a socialist society or "vigorously pretended that they did", according to Chandler. Chandler also noted that Pol Pot's supporters believed that it was "his clear-sighted strategies and tactics that had wrested control of Cambodia from the United States and its feudal puppets" and that he had "uprooted enemies from the party, encouraged vigilance, built the alliance with China, and masterminded the Four Year Plan." During the war with Vietnam, many Cambodians revered Pol Pot's Khmer Rouge forces as nationalists who were defending the country. Internationally, his movement received support from such countries as China, Thailand, and the United States during that conflict because they saw it as a bulwark against Vietnam and thus Vietnam's key ally, the Soviet Union. Various Marxist–Leninist groups endorsed Pol Pot's government while it was in power. The small Canadian Communist League (Marxist–Leninist), for instance, praised his government and sent a delegation to meet with him in Phnom Penh in December 1978. Another sympathiser who visited Pol Pot that year was the Scottish communist Malcolm Caldwell, an economic historian based at London's School of Oriental and African Studies. He met with Pol Pot, but was murdered shortly afterward; the culprit was never identified. Also in 1978, the Khmer Rouge met with delegates of the Swedish Cambodian Friendship Association, whose members openly sympathised with Pol Pot's regime. One of its members, Gunnar Bergström, later noted that in the 1970s he had been a Marxist–Leninist who had become dissatisfied with the Soviet Union and believed that the Cambodian government was building a society based on freedom and equality. In his view, the Khmer Rouge regime was "an example to the Third World". Bergström noted that he and his fellow members had heard about atrocities that were taking place but "did not want to believe them". Cultic activities around Pol Pot's tomb A number of cultic activities and practices have been observed around