With the emergence of technology, new societal standards and perspectives; should it be fair to "destroy" monuments/statues dedicated to people, whom are dictators to peace and harmony?

which time period is this? or is this story fictional, i'm going to need more info to answer this question

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.