If he’s a traitor, then he deserves a pardon and an invitation back home. Exposing the tyranny of the government against its own citizens to the public deserves a medal, not a prison sentence. He didn’t defect to Russia. He moved there and would be willing to come back if he could be assured that the Washington D.C. tyrants like Obama and Rubio would not lock him up in a gulag.
He engaged in criminal conspiracy. His providers knew of his actions, they aided in his escape. He didn’t knock on a door in Russia on his own.