can history be easily changed and ignored?

I am a person who likes history.. becos the things from history can be so different from what we have now.. and by reading history.. I can know how some things such as nations have developed to what they are now.. I especially appreciate buildings that have historical values.. many of them are so old.. but they tell a story.. if they are destroyed.. we will not know about the past.. maybe becos I am a sentimental person so I treasure old things..

therefore when I hear the news about taiwan renaming the Chiang Kai shek Memorial hall to the National Taiwan Democracy Memorial Hall.. I don't really understand it.. why must they do this.. before this.. many of the Chiang Kai shek statues have been removed from all over taiwan but isn't him the founding father of taiwan.. such an important figure.. he can be just easily removed from taiwan.. there is really no respect for him.. he is known to be a dictator.. but does it gives the reason that he can be removed.. many countries also have ruthless rulers and dictatorial leaders.. but they are still respected as a historical figure in the country.. such as russia and japan.. I just don't understand how some photos and statues can be so disruptive to some political movements.. and that they have to be removed.. and the people can be so forgetful about the contributions done by the leader..

no wonder.. our LKY never want to have his statues put up around singapore.. and face the fate of them being taken down one day in the future.. but I think nobody will dare or want to do anything to his statues..