How does the scene between Portia and the Prince of Morocco further Portia's characterization?

In Portia's interation with the Prince, as well as her other suitors, we are able to see that Portia is a bit of a snob. Her view of the suitors.... the witty remarks, and the very desriptive phrases all lead us back to one thing..... Portia doesn't want a prince, she wants a Venetian.

Portia also comes across as rude to the Prince of Morocco because she does not find him attractive, due to his black coloured skin. During the Elizabethan times, audiences would not have found racism as bad but as humour, this is why Shakespeare would have interpreted it in his plays.