"I don't mind playing unlikeable roles," he explained. "I've done it before. One of the things you should seek to achieve as an actor is that your character is understood somehow.
"I've had people come up to me and say, 'You're a guy who is going to blow up the vice president, you're lying to your wife and you just generally scare the hell out of us, because you are unpredictable and unknown - and yet we oddly kind of liked you'."
The actor added that it is the viewer's "choice" to decide whether or not Brody's actions can be justified.
"Some people will... choose to not like you, and that's fine," he said. "But... we were at great pains to find motivations for him, and [the writers] successfully did that.