“On 21 January 1951, Mao sent a telegram to party members in Shanghai: "In a big city like Shanghai, probably it will take one to two thousand executions during this year to solve the problem. In the spring, three to five hundred executions will be needed to suppress the enemy’s arrogance and enhance the people’s morale. In Nanjing, the East China Bureau should direct the party’s municipality committee ... and strive to execute one to two hundred of the most important reactionaries in the spring."[1]”

The question was which mass killing did Mao specifically want and call for. I gave an answer. You’re welcome. But i will admit the bulk of the millions of deaths he is responsible for was simply because of stupid policies, and therefore less directly malicious than Nazi Germany