1) He didn't really say that.
2) You misunderstood what he said.
3) He didn't know what he was saying / momentary lapse of judgment.
4) The judge is a racist! <<<----
5) It's apartheid's fault!
6) It never happened, the media made it up
7) Bladdy Agents/Colonialists/anti-revolutionaries/Imperialists
8) He did say it, but it's taken out of context.
9) You don't understand the culture.
10) It was just a joke.