Tone of the ending

Now I would like to begin with stating that I really liked this film. It had some very strong scenes and memorable characters, probably more so than most other Hitchcock films. However the ending is bizar. Hitchcock himself was reportedly unhappy with the it. He found it to be awkward for the audience to sympathise with the real saboteur, Fry as he hangs by mere threads from the Statue of Liberty. I share that view. When Barry ultimately fails to save him it is strange that upbeat music begins along the credits not much later. Perhaps it would have been more interesting if Barry the protagonist was the one in danger as he did with North by North-West. I really like the setup of the scene, the sleve ripping and so on but ultimately it could perhaps have been saved had Fry not dropped the gun thus still making him a threat.