Of course listening to it doesn't turn us into racists.
But who wants to listen to racist stuff? What's the point in re-publishing racist material rather than just pointing them to the libraries where it is already documented? Why is that insufficient?

"It is possible believe it or not to listen to this material and understand that it is of it's time."

I'm glad you used the word 'listen' there and not 'enjoy', because I don't think it is possible to enjoy white people harmonising the word 'n****r'.

'Of its time' has some validity sometimes, but it is a dangerous concept. It has never been morally right for white people to use the n word. The most generous interpretation of those white singers is that some were sympathetic to black people but still thought there was nothing wrong with using the pejorative term "n****r" in an otherwise non-racist song.
But they were wrong to do so; they shouldn't have done so. They knew it was a pejorative term and didn't think twice about using it.

Again (and again and again) why is it so essential that such songs be published on commercial compilations of otherwise enjoyable songs? They are already available to people who are determined to listen to them.