When Demons Are Forced to Rise

When angels deserve to die and the demons rise to take their place.
Inside the chaos the demons fight for equality and the angels fight to oppress the rest who didn't think the way their "lord" saw fit.
Now the demons are sent to fix what was destroyed by the self-righteous and pious vultures of their lord and his laws.
Sent to show there is no one way for things and no one entity should be worshiped over the others.
The angels dealt the death card on behalf of their foolish higher while the others are sent to clean up their mess of blood and fire.
They're called evil because they don't follow the single foolish "lord's" laws over the collective.
The angels are called heroes and holy, only because they will slaughter entire cities of people who choose not to think the same as their master, without a second thought.
They return to their master happy and content from what they'd "accomplished".
The demons aren't the evil ones, the angels are the unholy and misguided.