[Ibrîniðilpathânezel]

The entire tale of the Simarils is, in a way, a story of the evils of blind loyalty. The sons of Fëanor swore the same oath as their father, and led themselves and their people into tragedy after tragedy, attempting to fulfill it. In the end, the right thing to do would have been to break the oath and change their ways, but none did. In all of Tolkien's work, the subject of free will is a powerful one. Oaths never absolve one of the consequences of choosing to do wrong. Huan was not an ordinary dog, unable to choose to break his training. He was intelligent enough to know right from wrong, and was able to choose to do the right thing rather than rigidly follow his training like a good little doggy. Celegorm may consider that betrayal, but a master who demands that his followers follow him into evil has betrayed them first.