Because the "something evil" was legal genocide and oppression of Jews, black people, "queer" folks, and those with disabilities. The something evil took an atom bomb to stop it. The mustard gas made the land uninhabitable to this day. Just a tiny little evil thing? Nah. The list goes on. And has spawned numerous hate groups that are active right now.
Just because Hitler IS evil doesn't mean other leaders that weren't.
Nothing you described about Hitler is any different than what any leader of the US did at the same time or any of the western world.
The dropping of the atom bomb was done against the Japanese, not the germans, you do know that right?
The mustard gas made what land uninhabitable? Mustard gas was used largely in WW1 not WW2.
Seems like you are just throwing shyt out and you don't really understand or have knowledge of history.
Hitler is no different than any western power conquerer, nothing he did was even unique.
To claim he is supposedly "different" is ridiculous.
Hitler is your average white person with power and no concern for those who get in the way of what he wants.
No different than Belgian King Leopold, no different than teh UK royal family and the slavery and imperialism they spread, no different than the US higher echelon in either legally saying blacks were non human, practicing sterilization on us, practicing secret medicine testing on us, committing genocide against native americans, abetting massacres in Vietnam and aiding Pol Pot under the name of "spreading freedom", currently aiding opium growners and child rapist in Afghanistan.
So stop acting like Hitler was evil in carnate, he is no different than many of the politicians you see on tv today. Only thing is he lost.