frogprince--What Mark Antony was saying was that when someone has done a surpassing evil, that is what is remembered, not the good. And that he would let that stand. But then he goes on to say that if Caesar had done wrong, he ultimately paid for it, and that they should mourn him as the friend and champion that they remembered.

Antony's speech is here--more than worth reading--Julius Caesar, Act 3, Scene 2