At his time in history, being anti-slavery was not very common in the U.S. As I stated before, even though many Unitarians were abolitionists (such as Robert Shaws family - the Broderick charachter in Glory) the majority of them wer in New England, not our on the "frontier" in Buffalo.

Most people didn't bother to think to much about the issue until the war pushed it down their throats unless they were in one of the border states.