Columbus was worse than Hitler. Bush = Hitler, therefore Columbus = Bush = bad. Here is a clip from the Daily Show rewriting history this way.

BTW, there are a lot of references to Las Casas but this is not what Las Casas said. He was a monk who was the first advocate for Indians but he was also a great admirer of Columbus. The only known copy of Columbus's log is from a book that Las Casas was working on.