Glemek
They are paraphrasing ralph waldo emerson
Your actions speak so loudly, I can not hear what you are saying.
https://www.goodreads.com/quotes/486985-your-actions-speak-so-loudly-i-can-not-hear-what
But based on their user name they might be getting it more from the bad religion song “I want to conquer the world”
You seemed to already grasp what they mean when you said in a different comment that you already have the books to reread, and that this is a different thing. The closest thing to which it could be an adaptation of is the last 50ish pages of the silmarillion? It had some pretty big structural changes to that in season 1 already, so I don’t think fan fiction is an overly harsh description.
Besides while it is often maligned, fan fiction is fine. It is okay to like fan fiction.
Isis isn’t gone, they aren’t holding any territory right now and are greatly diminished, but they took credit for an attack in Russia this year even.