I can see him going crazy like a certain jester upon such a revelation, right?
I have actually long thought the Garleans to be of some relation to Allag, in a bad way though. I believe they are result of some aether manipulation stripping experiments on people, to make a citizenship or workforce that's unable to contest their superiors. Imagine Nael's face if he found that out, that his descendance was from his ancestor being a stripped-of-aether slave of Allag.