Yes, and vice-versa, with neither of them in the least averse to shedding the blood of millions of innocents--indeed, they reveled in it. If you hold the power of life and death over millions, and can impose death on them with seeming impunity, then by golly you're pretty darned important, aren't you? A god among gods.
Japanese butchering Chinese from 1937 on
Yep.
Hitler and Stalin played a game of poker with each other, with the bodies of their soldiers piled high as chips on the table.
Stalin was the better poker player.