The Death’s Head insignia long pre-dates Hitler, Naziism and the SS.
A web search indicates the symbol was adopted by the Prussian 5th Hussar regiment in the 1730s and symbolized disregard for or defiance of death or danger.
Other units in German service adopted the symbol as did at least one British regiment, the 17th Lancers.
The 17th were kown as the Death or Glory Boys, from the the death’s head badge over the words “ or Glory”.
So while the SS were unquestionably in the service of evil, their insignia had nothing to do with a sense of being evil.
Interesting. I remember seeing photos of a WWI German General who for some reason wore a big bearskin hat that had a large death’s head mounted on it. I wondered about that because he clearly predated the Nazis.