Does @Phil Johnson affirming of RL Dabney make him a racist?

In this video, I will discuss deceased theologian RL Dabney and his writings. Toward the end of Dabney's life, his writings would lead one to believe that he espoused views that would make him guilty of the sin of partiality. Recently assertions have been made that anyone who supports the theological positions of an individual must automatically agree with other ideologies that said person may have believed. We will examine the illogical and fallacious nature of such an assertion and how anyone who makes such broad sweeping statements is not interested in truth but rather more interested in fomenting divisions and causing dissension where none exists.

https://www.youtube.com/watch?v=-o_3nUtgh5Q&t=2s