Obi-Wan's hate for droids makes sense for his lost of faith in vader
I mean maybe I'm going out on a limb here but one can make the comparison to obi-wan's reference in episode 2:"well if droids could think there would be none of us here would there" to episode 6:"he's more machine now than man, twisted and evil(blah blah you get the point)". I'm just saying its quite interesting to see how his defiance in droids grows, especially when his former apprentice literally becomes half-machine(but having little hope in him via Luke Skywalker). I wonder if Anakin didn' fall in the lava would things have been different, well obviously they would but I mean if Anakin didnt fall in the lava and was still a sith would Obi wan still have hope in him? Ayone I would like to know......