hi, there's always room for more on this (especially regarding any link to the Aryan brotherhood?), but to get started, you may be interested in a couple of related posts
Was Gandhi sexist, racist, uncaring about the plight of Untouchables? - featuring /u/Bernardito
Was Mahatma Gandhi really racist against Blacks and Muslims? IF this really is true, did he change his views later on in his life? - featuring /u/drylaw