Earlier quoted context omitted.
Wait... Are you saying Mao is evil? Are you summing up all his actions, and written works with one quote from one essay... He wrote when he was young? And some how it's evil?
Evil being subjective, my answer is "fuck yeah". Stalin and him were full of it.
People act. Sometimes they do things that hurt other people.
But they are not "evil". Including serial killers: they can be mentally ill (physiologically), or have severe psychological problems because of childhood abuse and such.
Hitler, for example, was the elected leader of a huge country, with a grassroots following for years. Millions of people agreed with his actions, and thousands in upper echelons helped him execute his ideas. From the persecution of the Jews to the invasion to other countries, all of those ideas were quite popular in German thinking and public dialogue for decades before Hitler. It's not as if he was some evil creature emerged from nowhere and fooled everybody.
More to the point, nobody calls the leaders of the allies evil, despite they having done equally abominable actions, like killing 250.000 civillians (men, women, elderly, children, babies, kittens et al) with two nuclear bombs, or bombing hundreds of thousands of civillians in Dresden to shreds. But they are not called "evil", because they were on "our" side, and because they won and so official history (never far away from state sponsoring) accepted their justifications.
How about the bloodshed that was the colonial era? European powers killed, enslaved and exploited a BILLION people, in their countries that they invaded and conquerer. Were they "evil"? That would make every leader of those countries at the time to be equal to Hitler * 10.
Not to mention socially established wrong-doing, like people in the South having millions of blacks as slaves, abducted from their villages in Africa. Were the thousands of South slave owners "evil"?
Stalin and Mao are another kind of thing. Their rule led to millions of deaths, but it's not like they enjoyed killing people (as is probably the understanding of naive people calling them 'evil'). Part of the massacres were result of the inevitable power plays in huge countries with hundreds of millions population under a revolution (or regime change) -- the same way that 50.000 people were executed in the French Revolution.