Lyric discussion by returnsandexchanges 

Cover art for Godhead's Lament lyrics by Opeth

the main character is not refering to himself as a godhead, he's refering to melinda as a godhead because she has become a nun. this is revealed in a later song where she is described as "a harlot of God upon the earth."

the main character isn't an african slave, he's not othello... there are no themes of slavery or dominance mentioned in the album. the only reason people say that is because several things are described as being white. white is generally regarded as a symbol of purity and perhaps opeth is using it to create irony since the townspeople (the ones in white) are portrayed to be rather ruthless and uncaring zealots that hunt out the main character simply because he is different.

look at my comment to "the moor", i summed it up better there.