First of all:
It is the most senseless strategy to compare historic persons. Who was worse? Who killed more in a more cruel way? The Tsar of Russia? The King of Belgium? Hitler? Stalin? Nestle? Apple?
There are dynamics (human made) and there is violence, chaos and barbarism. Of course there are "peaks" of barbarism, where societies loose their coat of civilization, f.e. starting massive antisemite, racist pogroms, slavery a.s.o. - seriously... what kind of answer does someone expect asking "what do you think about Adolf Hitler"...?