I don't understand what destroying statues of "infamous" history figures will do... That's why they're there. You cannot erase history. Those statues and names are there as a reminder not to do what our dark history tells us. 

Not to be dark or horrid but that's why the Holocaust concentration camps are still around. That's why the American civil war equipment is still at Gettysburg. That's why Alcatraz, the Columbus statues and names, and other monuments/buildings/places. They are all there to serve that purpose. 

I keep remembering a quote by George Santayana and he said, "Those who do not learn from history, are condemned to repeat it." We must learn from everyone's mistakes and seek to prevent them from happening again...