We all enjoyed it back then. We would not find it acceptable today because times and attitudes have changed, but then is then and now is now.
Indeed ! I remember it as a kid, and it being considered perfectly OK family viewing. Seeing clips these days it of course seems well dodgy, as it likely always was to the Caribbean community back in the dat . Thinking about it as an adult decades later, l did wonder what actual racists might think about the "black guys" dancing with and presumably seducing the white girl dancers.
Of its time (its time being more like 1890 than 1970 I think) and best left there. Seriously what were the BBC thinking showing it in the 60s and 70s?
Semi related but there's a line in the original "I've got a little list" from the Mikado which has "the nigger minstrel show". Probably for the best this is invariable cut / replaced, but in fairness to Gilbert it does seem (perhaps rightly and "wokely") critical of minstrel shows, rather than being the racist line it seems to us now (or maybe it isn't, who knows for sure now?). Anyhow, in my view keeping the purity of the text, would detract from the artistic intent, which was invariable to lampoon pomposity and the ruling classes rather than "kicking down", which the words might suggest to a modern audience, hence this line is wisely cut