Ya there can be many possibilities but i believe he was not evil but because of his ideology which is nihilism, made him believe no lives matter and thus he became a monster
but what if kinserheim and the red rose incident never happens. What if he lived a happy life. With his mom and Anna, and his real name. What would’ve happened. The monster wasn’t born, but created right?
his whole life was an experiment pretty much. But then he took control. Damn he was actually scary as hell. Klaus poppe went from an evil man to some pathetic geezer