If Adolf Hitler believed that he was MORE than just a crazy...

... lunatic nutter hellbent on conquering the world and killing millions of people, yes in the name of "power", but for his own completely selfish reasons, to put it politely, and he also backed his philosophies with intelligence albeit of an "evil genius" kind of variety and whatnot...

Why couldn't he instead target the people who deserve to die, from various bullies who hurt the innocents, to child molesters including potentially guilty ones that came into being known and with evidence that they are guilty, other well known sexual and violent offenders, murderers and other well violent criminals here and there, rather than innocent people in the name of power and politics just like that?

Come to think of it, OK, so Hitler just wasn't THAT type of man wanting to make the world a better place, but anywaysm why HASN'T in real life there been a type of man or political power that attempted to try to implement THAT kind of policy, you know, kill evil to make the world a better place, as opposed to say, have the kind of (to give just ONE example) AWFUL systems in Iran that stone women to death for cheating (how would they like it if women killed them for the same deed instead?) and other utterly UNFAIR "systems of establishment" where unfortunately (as is common in our world sadly) violence and abuse including murder only affects innocent people who don't deserve it AT ALL? And for very selfish reasons to boot?