Same here.

A pattern in almost every song, book, poem, movie?

Like greed? Antisocial behavior? Populism? Lies? Belief in your own supremacy? Capitalism?

Honestly, my first thoughts were they eitnessed Cthulu. Though I suspect they intentionally chose to phrase it such that it invokes this analogy.

If we ignore the pattern aspect they mentioned maybe how history repeats itself? How tyranny emerges and sustains itself on fear and oppression?

I have no clue. It’s so vague.