Perhaps a separate thread to discuss the fictional origins of the Jedi and their use (or avoidance) of violence is in order.
Another thread was veering into the Tropics of Off-Topics so I will take Venthrac's sage advice and move the discussion here...
One notion:
Knights live by a code. Sjust that like samurai and Jedi, their code does not, in the end, have a fundamental problem with people ending up dead by the warriors blade.
Another:
Certainly a factor, yes.
However, with the fantastical nature of "Star Wars", the harder realities of Knights and Samurai don't allow for (in my opinion) direct analogies.
Below are my examples of what the Jedi may be more akin to:
http://www.youtube.com/watch?v=nPiYBfTE1ec
Not with this clip is Arthur's realization that he used the power of Excalibur selfishly. His penance for doing so and reward for owning to his mistakes.
I did not include a Samurai example as I know little of the culture and decided to highlight my ignorance. Instead, I include an example of the sort of Eastern philosophy that I do see in the Jedi.
What are your notions?