Unfortunately, despite Odin's cold-blooded nature, he is also highly rational.
In facing external threats to the Asgardian authority, Odin's retaliation is indeed ruthless and severe, yet he does not necessarily impose the same harsh treatment onto his Blood Alliance brother.
On one hand, his glory is inseparably linked with the brilliance of the Asa Divine Race. Unless it's a matter of life or death, Odin would rather adjust his plans than readily turn his back on him.
For instance, when plotting the great light and dark battle of the Elves, Odin, concerned about how he is perceived in his heart, deliberately hides this disgraceful affair; for another example, in the case of the Dragon Disaster of the Dwarves, Odin does not hesitate in breaking Bragi's leg due to his (Luo En's) appearance, thereby terminating actions against the Dwarf Clan... All of the above prove his status in Odin's heart and his significance to Asgard.
