Let me give you an example: Winston Churchill and the Bengal famine. Case in point -
Churchill statue 'may have to be put in museum'
So Churchill is termed racist and blamed for the Bengal famine, but let us not forget that Churchill played an important part in stopping the victory of the most racist regime on the planet. In 1943 stopping the Japanese advance into India required breaking down internal transport, in denial of the enemy. This, along with natural causes, helped precipitate the famine, but the British never tried to starve the Indians. Churchill tried to negotiate American ships to bring Australian grain, only for Roosevelt to refuse. In the end, winning the war took precedence; as Churchill said winning would also help bring a close to the shortages in India. It was a difficult decision, and the British still shipped as much food as they could without too much impact on the war effort, but now this is used to cement some view of Churchill as a callous racist. It is true Churchill was not fond of Indian self-rule, and thought (rightly it turned out) that Partition and a rush to Dominion status would result in a bloodbath.
So now a man who spent years opposing, and was instrumental in defeating, a regime that literally incinerated people they thought inferior races, now has his statue defaced in the name of racial equality. Not to mention Churchill's general benevolent view of Empire, in which he opposed the attempts to separate non-whites that the Americans tried to do, supported the Cape Franchise, opposed the extreme violence of colonial forces in Natal in 1906,etc. By modern standards, certainly a racist - but by the standards of his own time; where Kitchener played polo with heads of Mahdists in the Sudan, and the Germans collected heads in Tanzania, and the Belgians had a zoo of Congolese and lobbed off their hands and feet; he was a liberal supporter of humanity. True he believed in the White Man's Burden, but he envisioned all the colonies eventually transitioning into a brotherhood of nations, regardless of skin colour. He disliked Hindus, but he had admiration for the so-called Martial races of Gurkha, Rajputs, and Sikhs, etc.
We are replacing the Finest Hour Greatest Briton with another narrative, and while the former was by no means objective, the latter seems even less so. For all his faults, Churchill did far more for racial equality than he did to oppose it; probably more than the majority of people in history.