Answer:
To pro-slavery factions, liberty and republicanism were to a limited extent, that is to say, they only applied to white people, not to black people or to enslaved people. Pro-slavery factions thought that it was their right and freedom to enslave other people to work for them.
To abolitionists, liberty and republicanism were universal and applied for everyone. This meant that slavery was not to be permitted, because it went against the very liberty of a whole group of people.