I think that from an archealogical point of view, that his tomb should be opened. There is lot that we don't know about the ancient cultures of people and their ways and customs. Furthermore, I don't want to sound like a cruel person (no pun intended), but as far as we know I am certain that he wont mind, after all he is very much dead and if in life all that he ever contributed in life was causing grief to others, then let us at least use this chance to learn other great things that can benfit the world and of coarse the Chinese culture.