Primrose, why were your friends very upset? Edward Colston was responsible for the death of at least 20,000 men, women and children.
His motivation was pure greed at a time when society was increasingly questioning the morality of buying and selling human beings. Ignorance and the old trope of "it was a different time" holds no water. Neither does the passing of the centuries dilute the mass murder of children. To maintain a statue of its perpetrator is, I would hope, completely unacceptable to any decent person.
Perhaps then you would like to explain in greater detail the basis of your friends' upset and why they wish to laud and celebrate a wealthy slave trader?
Urmstongran, you obviously haven't read my post in full. I have explained some of the background, frustrations and peaceful resolutions submitted over many decades.
You seem to question my words of "hurt and shame" but unless you live in my city or have an in depth knowledge of the subject, your sarcasm is misplaced. You would be far better expending your energies on reading up on the statue and its history before you comment.