guest948 am makes a good point about are you prepared to sing it etc, but it is not as simple as that, it depends how you introduce the song, if you say this is a song that was a song written by an abolitionist who was from a family of abolitionists. The family home was part of the underground railroad. Kingdom Coming was written in sympathy for the enslaved and gives them the upper hand in the song and modernise some of tthe lyrics it can be acceptable,
if you dont give that kind of introduction and use the darkie words it could cause offence., in other words it needs a carefully thought introduction and some lyric changing

Jeri come back in 10 years when you have something useful to say other than making snide swipes at another member