1. Stalin, who killed 20 million of his own people before Barbarossa commenced, and why? Because of his own paranoia!
He condemned the "White Russians", the Poles, to death with the Nazi-Soviet Non-Aggression Pact, whilst having thousands of Polish Officers slaughtered at Katyn; he then stood by whilst heroic resistance from the Polish Home Army was snuffed out in Warsaw, when he could have liberated Warsaw easily; he then had the temerity to pretend to be shocked at the Nazi extermination camps; bear in mind that the Soviet Gulags didn't stop operating after the Second World War, Alexander Solyshenitsin, being one prominent victim; the Gulags' main method of extermination? Mostly Starvation, forced Labour, etc. Sheer indifference, which by the way, is the absolute opposite of Love, not Hate, which denotes at least some emotional attachment 2)Hitler, because he prepared to kill all who stood in his way, he set up camps to specifically kill people (Auschwitz-Berkanau, Mjadenek, etc), he believed God to be on his side and used the worst kind of lies, that of half-truths, eg "National-Socialist"? , he was prepared to have every German die with him, and he revelled in cruelty, eg having those implicated in the July Plot strung up on meat hooks by piano wire, and filming their death agonies.
But Hitler hated, Stalin mistrusted, and disposed of those he had the slightest reason to mistrust in Gulags, where he could just forget about them (indifference); Stalin had more of an evil about him 3) Mao showed indifference to the suffering of his people, seeing them as mere fodder in his grand plans, but he had no real plan for world domination; this must be viewed from the perspective of the times he found himself in, however. Different degrees of evil are still nonetheless, EVIL. God Bless you.
Stalin killed the most, but he murdered everybody for no reason Mao was just bizarre But Hitler planned to systematically remove large portions of society for no real reason, even though he killed less people then Stalin or even Mao, neither of them planned anything so monstrous.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.