What can we do today as american citizens to protect laws that we consider unjust?

We can have protests, petitions, etc.

Hope this helped, and please mark brainliest! :)

Frederick Douglass's main cause was to abolish slavery and he spoke from bitter experience since he was once a slave. Basically he became a great orator who condemned slavery and also he wrote several autobiographies sharing his experiences as a slave and why he was so opposed to it.