This article is an excellent idea and well written (minor SPaG errors notwithstanding).
However… as a Christian, I am extremely strict when it comes to what is and is not acceptable with regards to the use of Biblical Scripture. I enjoy reading Scripture and seeing it anywhere. But in this case…
How good and pleasant it is when God’s people live together in unity!
— Psalm 133:1
The intent behind your use of this verse is not entirely clear to me. The use appears to be ironic? — rather than "living in unity", people are dying en masse. And this is neither good nor pleasant.
The reason why this concerns me is that as a Christian I do not want to see the Bible taken out of context. When you use this verse do you grasp the meaning of "God's people" as His chosen nation at the time, ancient Israel? Are you conscious of this and choosing to drop the significance of the term "God's people" in your use of this verse? Or are you re-contextualizing "God's people" to make an association in some way to "Godhand", which is itself violent and unholy in nature?
The association of a REAL Bible verse with FICTIONAL and ALSO MALEVOLENT concepts and characters (i.e. Godhand) makes me uncomfortable. It's not an outright misappropriation of the Psalm, since to my understanding it is being used ironically with a mostly correct understanding of its meaning. But the ironic use still feels like it taints readers' impression of the verse. The psalm is meant as a genuinely joyful celebration. Its use to further an unnerving horror atmosphere doesn't come across as respectful.
There's plenty of ways to apply Bible verses correctly, even for fictional stories — mainly when the message of the story is fully reflected in the message of the verse itself. I also know you don't mean any offense. But the use of this verse here just doesn't sit well with me. Personally, I would not dare to risk profaning my God's Holy Word in this way.
I'd really prefer if you replaced this. You could easily come up with your own banger quotes, or search for something secular instead! If you are insistent on using Scripture, I'm also happy to provide you with more apt verses in future writing.