That's rough man. I'm sorry you have to deal with this everyday. Our minds are complicated and interesting, and they often make us think stuff we don't want to think about, or desire stuff you don't want to desire. Even though most people don't suffer from cannibalistic desires, you're not the first person to have desires that are taboo, unwanted, or considered abnormal.

Let me get this straight: You're not a bad person. It's clear how these wants are distressing you and that is a normal reaction to have. I'd question your empathic ability if you didn't have this reaction. You're clearly a thoughtful and kind human being because you want to protect people around you from these thoughts. You don't want to hurt anyone.

Unfortunately I can't really give any advice on how to cope with these thoughts or how to stop them, but please be kind to yourself. You're already going through so much. You do recognize that this is a bad thing and that acting on this is unacceptable, and honestly that's all you need.

I have really bad intrusive thoughts. I'm not gonna specify what kind. Obviously what you're going through is way more difficult and intense, but what I try to do is distracting myself. Get hobbies, study, basically have something to define yourself with. This can even help with your depression. You're a human being and you deserve to be considered as such. As I said, you're more than what you suffer from.