Maybe because a peril of indifference that happened with Wiesel's situation was that the soldiers who freed them and that experience has fallen into a kind of forgotten obscurity I suppose, in the full of scheme of what happened.
After the french revolution the absolute monarchy was diminished. With the fall of the the absolute monarchs there came something that was similar to it. Napoleon established a dictatorship of sorts. The people also formed something called a declaration of rights which allowed them to prevent the church from having control of the rights of people. The French also temporarily lost the ability to tax the people leaving the people in a bad state.
The north wanted to free all slaves while the south wanted slavery because they were using slaves to pick the labor intensive cotton.