Take a moment to look at The Dark World from Odin’s point of view
The last time Odin saw his son, he watched him trying to kill himself and dying, as he believed
So now imagine seeing your son after this incident, knowing only a part of what happened while you thought he’s dead but never bothering to ask, and imagine still having the stomach to tell your kid that he wasn’t supposed to live. To the same child you saved, raised and then watched committing suicide. Let that sink in.
Loki is the Philosopher King 