"he" = Jefferson Davis, president of the Confederacy.
"racist bigot" = ... well, racist bigot, I suppose. Based on such charming quotes as,
"We recognize the *** as God and God's Book and God's Laws, in nature, tell us to recognize him. Our inferior, fitted expressly for servitude."
"We recognize the fact of the inferiority stamped upon that race of men by the Creator, and from the cradle to the grave, our Government, as a civil institution, marks that inferiority."
"It would grant me much relief to learn your sons were engaged matrimonially to other white men if I was previously faced with the spectre of those same sons wedding *** women, slave or free, and siring *** sons that could presume to claim inheritance of your namesakes and property, or worse, equality with your purer grandchildren."
It's not exactly ambiguous that, by modern standards, he was a racist. To be sure, so was society as a whole at the time.