Django never stepped out of character...and he survived.
I said he (and Broomhilda) let their guard down by looking at each other too much. Stephen figured it out and turned them into massah.
In really oppressive conditions like that, you can't always expect empathy. Likes crabs in a barrel.
You realize none of this is factual info, right? There's no right and wrong interpretations. The characters and situations were made complex and imperfect on purpose.