I don't like Columbus, I disagree with much of what he did, but those murals are now part of the recorded past and must be accepted for what they are. I do not see why anything should be covered up. The people of today have zero connection with what happened hundreds of years ago so need to overcome their feelings and accept things for what they are. It's done, nothing can be done now. Hopefully those same people who consider invasion dangerous, toxic, violent and disease ridden will accept that walls can be useful.