I love Clarke, as an Englishman, and he is my favourite batsman in world cricket. He also probably the best captain in world cricket.
HOWEVER
Saying, as a captain, that you are going to break someone's arm is absolutely ridiculous, unacceptable and sets a worrying precedent.
I love the sledging, the banter that comes with the Ashes- it is what makes it what it is, and I understand entirely that this is 6 and half a dozen. We give it out too, that cannot be ignored, and I'm sure similar things were said by our boys.
There is a line in the sand, and unfortunately Clarke has smashed straight through it.
Keep it sharp, within the lines of common sense and play cricket- both England and Australia.
If people cannot see that what he has said is wrong, they need to take a long hard look at themselves.