What is a literary technique in the Two Minutes Hate scene in 1984?

In this
extended scene describing in detail propaganda and demagoguery at work, showing how a group of
people can be manipulated into an emotional frenzy, one literary techniqueuses is  . For
example, to convey how annoying the enemy Goldstein is to the audience, Orwell likens him to a
sheep, both because of his long narrow face and nose, with the spectacles on the tip of it, and
his...