Come on Tasha. There is very little difference in your igger and igga words. It is all about context, how it is said and who is saying it.
Again, your people have empowered that word. If you can't see that, I don't know what to tell ya.
BUT, if it makes you happy.....Mdawg is a sand Nigga.
And lets not forget, according to any definition I have read the term is used for not only black people but any darker skinned person. Thus it works for both Mdawg (middle east) and Singer (Guinea with African blood)