English lit Othello question

I think it would be good to look at their relationship as 1) interracial and 2) between people of very different class. Do you think the state is portrayed as being against their relationship because Othello is black and originally from a very low status?

The first act would be pretty good to look at. There is clearly great tension over Othello's skin colour and Brabantio is overtly racist in his condemnation of their relationship because Othello is black. However the duke (the state) does let the marriage stand and does not persecute Othello, which would suggest that the state doesn't desire the destruction of their relationship. The Duke does however say 'Your son in law is more fair than black', which suggests that Othello is an exception and that in most cases they would be against interracial couples.
Desdemona is the daughter of a very wealthy Venetian Senator, whereas Othello was literally a slave at one point. But the Duke and other senators admire Othello for his bravery in battle and qualities as a general, suggesting it is possible to climb the class system and marry 'above your class'.