The problem with the radical and dangerous left is that they do not look at history in context. Slavery is - quite rightly - viewed as an historical wrong, but it was an economic norm of the time. People were traded as commodities throughout the world throughout many centuries. We bought African slaves from African leaders who sold them to us (and who also traded their own people amongst themselves). We also stole people to make into slaves, just as our coasts were pillaged by the Barbary pirates who stole people from our coastal towns and villages. We have evolved since then and there is nobody alive who can take any credit for the slave trade. I cannot understand why people have to ignore the achievements of somebody once they learn they had a connection to the slave trade -- doing that is cherry-picking at history. It should all be remembered, but it is up to a society to decide what it wants to learn from or celebrate. I recently went to the Museum of Industry and Science in Manchester and was saddened to see that so many of the exhibits were interlaced with comments about the slave trade. It detracted from what we were trying to learn about and it seemed to be the only topic of conversation amongst the school trip who were there. It is getting too political.
Colston was fundamental in Bristol for improving the lives of the labouring poor, and it's criminal to tear down a statue of him because the radical, dangerous and militant left refuse to be civilised in their analysis of history.