The rakshasas are the natives from lanka,their anchestors goth hated from the aryans because of their blackmagic.But the rakshasas was not that bad,some also has been the protectors of the human kind,because they served brahma,the ruler of the sun system.But the aryans remember in their scripts(for example ramayana)only the bad,that is why the name rakshasa stand for the"bad gigants" of the atlanteen race.Names have power,oh,Lanoo,but often they do not express the thuth.