Gerrard's sending off wasn't unfortunate man, It was boneheaded. And he knew it as soon as he did it. You lunge in, particularly in the International climate, like that when your already on a booking, you run the risk.
Fortunately for England the next game is against San Marino at home, so he won't be missed. (Personally, that wouldn't be an issue with me anyways as I'd be slowly fading the old guard out, and San Marino would be perfect to blood more youngsters. But he's integral to Hodgson so it's relevant.).