I choose not to dehumanize people.

That presumes that wishing for someone’s death dehumanizes them.

If Hitler had been captured, what would killing him have done? I am against the death penalty as well.

Created an example and a precedent that rulership is not a shield against punishment? Removed a vile human being from existence? Avenged the literal millions of helpless innocents he ordered slaughtered?

Just wish for a solution to the problem,

Death is often a viable solution. Oftentimes more viable than the alternatives.