At the "National Convention", nobles were stripped of their titles and their lands were seized, since this was part of an effort by the masses to reduce class inequality in France.
I would say that King probably said that people have a moral right to obey just laws just as they have that same moral right to disobey unjust laws such as the laws of segregation between whites and black Americans in some southern states.
The propaganda, slaughter, and inanity of World War One.