How we cite our quotes: All quotations are from Thor.
Quote #4
THOR: The Jotuns must learn to fear me just as they fear you.
ODIN: That's pride and vanity talking, not leadership!
Again with the rules spelled out. Odin correctly points out that ending the threat of the frost giants means more than just bashing them on the head. Thor needs to learn that before he can rule.
Quote #5
LOKI: Why? You were knee-deep in Jotun blood. Why would you take me?
ODIN: You were an innocent child.
LOKI: No. You took me for a purpose. What was it? Tell me!
ODIN: I thought we could unite our kingdoms one day. Bring about an alliance, bring about permanent peace... through you.
Loki really doesn't understand why Odin would do what he did. The thought of some greater good being served by taking a baby from a battlefield is truly beyond him. That, at the end of the day, is why he's the bad guy.