We live in a holographic construct, comprised of multiple vibrational layers, or plains, of realities.
Who built this construct?
If literally every single one of Earths religions are to be consulted: God.
Every man can feel it in their bones, there is something greater happening here.
If I had to guess, these occultists are convinced we live in a four dimensional construct, kind of like a tesseract. So, they think the 5th dimension is their escape, hence their obsession with breaking the fourth wall.