Well, whether he actually physically raped people isn't really the point. He did ultimately rape people of their land and their dignity, so yeah, I think it's great to tell children the truth. I can remember having a huge argument with a history teacher over his lesson on Andrew Jackson - he called him a great president, I called him a murderous racist. (Yes, I know his family were killed by native peoples, but you can't take these things out on a whole race of people. There was no cause for the Trail of Tears, in my opinion.) I think it is important to discuss things as they actually were, without romanticization. When teachers talk about slavery in schools, they explain things as they actually were (well, maybe a scaled down version that isn't quite so brutal, but it certainly isn't glorified.) So why not be honest about who Columbus was, and what his actions ultimately meant to millions of people who had everything taken from them?