Who is the Vengeful One, the Hand of God, the Dark Messiah?

"It's as if the entire world's fallen in love with their insanity
Hear the innocent voices scream
As their tormentors laugh through all of it
No forgiveness for all I've seen
A degradation I cannot forget

So sleep soundly in your beds tonight
For judgement falls upon you at first light

I'm the hand of God
I'm the dark messiah
I'm the vengeful one"
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