I think a more interesting question to answer is when and why these statuses were put up? If a statue is put up 150 years after someones death to hero worship them ( or surpress part of the community) then I don't think the 'history' argument stands and it then becomes legitimate to take them down
Was it to hero-worship him or simply to identify to financial contributions he made to the city?
Back in December 2020, following the BLM protests, the Labour councillors of Medway decided to "cancel" one of our greatest 16th century seafarers, Sir John Hawkins who designed the ships which defeated the Spanish Armada and was vice admiral in that battle. He had links to slavery as did most seafaring men of that era, yet the people who commanded him - Mary 1st and Elizabeth 1st, plus others such as Sir Francis Drake seem to get a free pass - why?
Where does this all end? Do we have to erase all traces of these people from history, from artistic works?
A new name has been agreed for a car park formerly named after slave trader John Hawkins.
www.kentonline.co.uk
en.wikipedia.org
However repulsive slavery now is, back in the day it was normal. Slaves were the technology of the day (high capital cost, low running cost, disposable when worn out and part of an inferior species [as taught by the church] and were regarded in much the same way as farm animals of today). The people who grew rich from exploiting them didn't see anything wrong with their behaviour, and many contributed to society (or at least to white society) with their generosity.
So, what has actually changed? Wealthy people still exploit the people who have no power, by paying low wages, providing zero hours contracts, moving production to cheaper labour countries and getting dodgy contracts from governments. They often use their ill-gotten gains by buying influence, a peerage and setting up fake charities to gain even more money and a false respectability.
Even our greatest national hero, Nelson, once wrote a letter in support of slavery, even as late as the early 19th century, slavery was normal and acceptable.
Nobody, myself included, can support slavery now but we should not, IMO, judge the past by current standards. What we should be doing now, instead of removing old statues, is to get rid of modern slavery, which exploits illegal immigrants and other vulnerable people.