In both the films and EU material, Jedi often seem to have a view of droids (even high-level ones, not talking GNKS here) as lower things. Not all Jedi, but there is a general attitude that they are expendable, moreso than with other good factions. Now, it'd just be something I'd ponder for a moment then assume that well, Jedi value life. But certain things are said in Star Wars, pertaining to that opinion that are contradictory. Sure, as Lucas has said Droids have no 'Soul' but in star wars, there's no confirmed souls beyond the oversoul that is the Force, and your connection to it. Each person only has soul inasmuch as the Force is one. And yoda himself says that the force is in all things, "The tree, the rock.". If the force resides within the rock, then there is at least a spark there, perhaps inert, but flowing. With this way of looking at the world, Jedi should have a shinto-like appreciation for even inanimate objects. And since droids have electrical circuits can that do the same things as an Organics chemical circuits, isn't their bit of force as sacred as an Organic bit of force? And therefore, from a spiritual standpoint, shouldn't the Jedi see them as equals, protect them thusly, mourn them thusly?