Uh! The guy in question may be in some need of medical help but I doubt the government of most any nation is going to be interested in someone who says he wants to go to a another nation and join the military unless they happen to be at war.

Lots of people say stupid things and even do stupid things without it harming the national interest.

I am having trouble understanding why this is viewed as a Traitorous act. It isn't illegal to immigrate is it and if he doesn't like his country of birth, good riddance.