First of  all stop stealing our civilisation(Indus valley) and say that it was created by you black africans.It was created by us dravidians. 
 Original dravidian might have been dark skin but they are unrelated to africans(May be related  by the single origin theory ONLY). 
 On examining the teeth,structure of the head (of the skeletal remains found in THE iNDUS VALLEY)it has been proved that they are not africoids but resemble that of the present Indian. 
    Skin pigmantaion is due to selective pressure.Other than skin darking there is no such connection with the africans.Finally do realize that Tamils are not Dalits and No one in India treats them differently.Who the hell told you that people get discriminated based on the skin colour in India?.If you still belive that Tamils are related to africans then all the people white,yellow,red are related to you in the same way.Be happy with that and leave as to ourseleves.Dont bother us Deeecevoice with your own Stupid ideas!!!! 
 We know our history,we know how we look ,we know about ourseleves.You 
 dont need to tell us who we are.