Dating back to the 1800's many religious figures have been against slavery for many reasons.

In addition to this article, many figures throughout history have had the same mindset as Walker. These include William Wilberforce, Frederick Douglass, Nehemiah, The Quakers, and Richard Allen.
William Wilberforce (below)

Frederick Douglas(below)

The Quakers(below)

In particular, Wilberforce, who was twenty-one when elected into Parliament, used his platform to speak and fight against the slave trade. Sadly, William Wilberforce passed away three days after his final bill in the British Parliament was passed. Still, under his leadership and before his passing, the anti-slave trade reformers convinced Parliament to close the African traffic in 1806. Thankfully, with his heart for ending slavery and persistence, slavery was banned in the British colonies in 1833.
The article also claims “The primary argument against slavery by Christians was that it was immoral in the words of the bible. This really began to pick up speed - the argument between the religious support or repremandment of slavery - in the 1850s.” In addition to Walker’s article, the Young American Republic sources William Hosmer, Slavery and the Church, (Auburn N.Y., William J. Moses, 1853), 99 as they added to their writing: "It is not denied that the slave holder may be converted and become a Christian; he is not beyond the reach of grace, but in order to obtain it (grace) he must renounce his sins. The drunkard may become a Christian, yet not without putting away his drunkenness; mercy is gained only by repentance. Still further, it is not denied that men may be Christians ... Having premised these things, we shall now present the argument against the religious character of slave-holders. 1. Slave-holders cannot be Christians, because slavery is sin."²
Not only does religion argue for both also against slavery. People can take different scriptures to justify their actions. As people continue to practice religions such as Christianity, Islam, and Judaism, arguments for a topic as controversial as this one can still be found in their texts.
Bibliography:
http://projects.leadr.msu.edu/youngamerica/exhibits/show/antislaveryreligion/antislaveryreligionusa
https://restavekfreedom.org/2016/08/05/5-religious-figures-who-stood-against-slavery/
http://nationalhumanitiescenter.org/tserve/nineteen/nkeyinfo/amabrel.htm
https://aaregistry.org/story/british-abolitionist-william-wilberforce/



