Can you show how the different classes were prejudiced?

From the text:

“an old black ram is tupping your white ewe” (Iago – Act One Scene One)

“thick lips” (Iago – Act One Scene One)

“covered with a Barbary horse” (Iago – Act One Scene One)

“o, the more angel, she and you the blacker devil” (Emilia – Act Five Scene Two)

“Your son-in-law is far more fair than black” (Duke – Act One Scene Three)

“The sooty bosom of such a thing as thou” (Brabantio – Act One Scene Two)

Othello is constantly referred to as, “the moor” as if his ethnicity is more important than his name.