Unfortunately, it isn’t so simple. Eliminate a Churchill, and you have a Hitler in control. Eliminate a Joshua, and you have a different religion as a dominant culture. There may be a small number of people who revere Churchill as a saint, as you put it, most people however remember Churchill as the man who stopped Hitler before he could consolidate his forces across Europe. That should be remembered and celebrated - the consequences of not having Churchill at that time and place are enormous. If it doesn’t seem that way, that is only because the war was won, again, because of people like Churchill. Even Stalin gets a tick there - if he hadn’t so ruthlessly sacrificed Soviet troops to defend Stalingrad, the war in the West may well not have been enough. Churchill was a war leader who helped to win a war, he is and should be remembered for that. That’s why there are statues of him in the U.K. He’s not a ‘cultural icon’. If you think the memory of people we owe our security to should be eliminated on the basis of a peacetime (temporary) consciousness then where would you draw the line, and why? King David wiped out whole towns to extend his influence, should the psalms be removed from the bible? The Judeo-Christian god has taken many human lives and caused a great deal of suffering, should he be removed from the bible? Should all churches and synagogues be destroyed so that we don’t celebrate any cultural icons with blood on our hands? Should we get rid of our armed forces altogether and just let someone else do the dominating? The kind of arguments you are putting forward might sound ok in a classroom, but they have no real-world value.