Melakon

Melakon was a villain from Star Trek, a humanlike alien who was part of a Neo-Nazi regime formed by a misguided Star Fleet officer who believed that the philosophy could do good for society, despite its many flaws.

Melakon was not so keen on this attempt to soften Nazism however and decided to go down the same dark path that Hitler did on Earth - drugging the Star Fleet officer and effectively taking his place so as to try and orchestrate his own version of the Holocaust upon a neighboring world.