The idea that these statues are praising slavery interests is flawed, given that the commemorators, those who decided to erect the statue, did not intend to glorify the negative acts. The focal point of the statue is the figure’s overall positive contributions to society, so the statues do not celebrate evil acts but rather acts which helped and furthered society. That said, the removal of the statues is unjust.
Moreover, slavery was not deemed an evil act during the late seventeenth century. While it may be that we view it as evil and unjust given our belief system today, the historical figures could not have conceived of it in the same way due to a generational difference of morality.
Slavery, and what we would call white supremacist narratives, were very much normalised and commonplace. So, the statues do not celebrate evil acts because at their time of erection, slavery was not widely viewed as immoral. As a result, the removal of statues is not just.