Gangstalking is done by a secret society of neo masons called the Monarchs. They use advanced tech to do their ops, and they can READ MINDS. No joke, when you have gangstalkers repeating words you only thought and never spoke out loud to you you'll understand.
The secret society is probably linked to the military since they use advanced tech.
They call that a Descent to Hell or being swallowed by a whale ( reference to Jonah ). The goal is to make a target insane and to either send them in a psychiatric hospital or in jail.
It's done to destroy someone a 100%.
They call people going through it " dead " and some people get recruited in their sect after it happened to them. It's called being Born Again or resurrection or metamorphosis ( hence the monarch butterfly symbol they all use ).
They have multiple names but the main one is Monarchs. The Lys Flower is one of their symbol.
They can modify your dreams, beam images in your mind's eye or like I said, read your mind or talk to you through telepathy.
Fucked up shit.