Some sources on Ghandi's outrageous opinions about black people:

http://www.thoughtleader.co.za/sentletsediakanyo/2008/10/17/on-mahatma-gandhi-his-pathetic-racism-and-advancement-of-segregation-of-black-people/

http://www.telegraph.co.uk/news/worldnews/asia/india/8410318/Mahatma-Gandhi-racist-and-bisexual-claims-new-book.html

http://www.guardian.co.uk/world/2003/oct/17/southafrica.india

http://www.nairaland.com/37329/gandhi-racist

He also hated Indian Untouchables and thought they should be denied basic human rights.