Quite so. We must try to tell the truth about the past, and the traditions that belonged to it; there is no virtue in disguising the fact that it was often unpleasant. There is also no harm in making it clear, when posting texts that are nowadays liable to offend, that these are historical documents, things of their time, and presented as such. It would be wrong (and very stupid) to censor traditional or historical material to conform to modern taste or political correctness, because that would be to tell lies about the past. We need to know how things were so that we can make informed judgements about how things are; and about how things ought to be.

Having said all that, we should perhaps avoid posting material which is potentially racially or culturally offensive unless there is a good reason for so doing; and when we do, we should make it clear that that was then, and this is now; and that the two are not the same.