So what you're saying is, is that when you shoot droids you lose perspective on the value of living things. Because they both move and resemble each other, you won't mind killing either of them on the long run. Okay, well, that's a long debate. Similar to the debate on the effect of 1st person shoot 'm ups computer games.
Some argue that by constantly playing shoot-em-ups, once gets so used to shooting at people (or monsters or droids) that sort of forms a callous on your soul.
Okay, now there are two problems with that. One is that there is still no hard evidence that there is a correlation between the two, despite some unpleasant killings in the US by teenagers who did in fact spend A LOT of time behind their computer playing such games.
The other is that the Jedi don't spend weeks or months non-stop killing of battle droids. Nor is that all we get to see in SW. It's more like taking out flack or cannons, offensive or defensive armoury that is out to get your hide. The fact that they move and talk makes no difference.
And there will always be the difference in your mind between taking out a machine and a living, breathing organism. Unless your brain is already so blunt that one should wonder if you can be called human at all.