Rank the following individuals according to who was worse (least worst to most worst): mao zedong, joseph stalin, adolf hitler. (this is a legit question pls )

The answer to the question:

Rank the following individuals according to who was worse (least worst to most worst): Mao Zedong, Joseph Stalin, Adolf Hitler.

Is:

1)      Mao Zedong

2)      Joseph Satin

3)      Adolf Hitler

i feel as if they would both catch on before to long because they would see them to frequent