(Original post by sj1994)
it's completely full of racial connotations, the beastiality throughout with links to the colour of his skin...
Indeed he is black, and there are examples of racist use of language
However, most of these language are either used by Iago to manipulate other characters (such as brabantio) or out of pure hatred for the elevation of Cassio's status over his own.
Iago does not hate Othello because he is black, he is merely racist to emphasis the extent of his hatred.
Again, it'd be too narrow minded to think that the main focus of the play is Othello's race. I think its more to do with the danger of Jealousy, Pride and typically the fall of a tragic "hero".