So if Colston can go, and Savile, and Churchill is fair game, why can't we get rid of Marx as well?
Yes, and Oliver Cromwell and Queen Elizabeth and anything related to Nelson...
I am old enough to have seen some of the statue removal and name-change campaigns of certain regimes. Which as we know followed along after previous removals and campaigns of name-changes. In fact it happens again and again in these kinds of situations, the old gods are removed and the new, good and pure ones, are erected. Of course the same old problems return, and they find out the new gods aren't all that, after all.
It's one thing I think to find someone was a criminal, like Saville, and frankly, someone who didn't really do much of anything important anyway and would have been forgotten in two generations even without a scandal. It's a bit different when we are talking about someone who was operating within the laws and thinking of their time, or who unquestionably had a significant historical importance apart from whatever it is we now see as a problem.
One of the functions, I think, of seeing the monuments of the past, is that they give us a more realistic appraisal of the monuments of our own time - they caution a little healthy skepticism.