For a start, who's come and claimed that? I've seen one or two man come forward with some questions and a statement, that happens to be true, that RastafarI is a Black thing hailing a Black king, so what is the problem if Ethiopia (which means 'land of black faces') is the root of creation? The I really cannot 'not see complexion' because only the colour blind are actually colour blind, and even then not enough to not notice the difference between Black and White skin and features. The blind are the only ones who don't see complexion.
Ironically it is these kinds of things said out of ignorance and a completely illusionary perception of antagonism in this case that actually split and polarise people along racial lines. I don't know which part of Haile Selassie I's autobiography the I is talking about, but go humble and read it again carefully instead of trying to define who is and isn't Rasta on the internet. It's HIM who sets the standard at the end of the day, whatever your colour, and who has eyes to see will see.