Villains! You did not so, when your vile daggers
Hacked one another in the sides of Caesar.
You showed your teeth like apes, and fawned like hounds,
And bowed like bondmen, kissing Caesar's feet;
Whilst damned Casca, like a cur, behind
Struck Caesar on the neck. O you flatters! (5.1.40-46)
What is Antony's purpose for calling Cassius and Brutus flatters in the quote above?