Suppose I dug up your grandmother's tombstone and destroyed it with a sledgehammer then proceeded to urinate on it. Then I told you that I don't really think it

Suppose I dug up your grandmother's tombstone and destroyed it with a sledgehammer then proceeded to urinate on it. Then I told you that I don't really think it is that big of a deal, that your grandmother is old and all that but it really is unfortunate for all things to change. Perhaps I even said that that you should look at my urination as a defacement of your grandmother's tombstone as an amazing piece of art that tells the story of the current social climate at this point in time. Never minding the fact that this is your grandmother we're talking about, can you think of any other reasons why this would be wrong? Can you think of any historical reasons why a 30k old artifact of visual communication might be noteworthy to preserve?