Jedi are responsible for the fall of republic and their own death. This great War blinds their vision and makes them so gullible. Feel so sorrow that all of them are committing their final fate.
It is so beautiful. The visual treatment, animation, character arc -- the whole package! The song would have been cheesy just by itself but when it is coupled with the pure joy of a small child, it becomes incredibly moving. I have watched this film three times and I managed to be impressed by the small details and big emotional reliefs each time.