I can shed some light on the mysterious case of the disappearing phrase. At least I think I can.
I gether that the Stop the War Coalition officers (German and Murray) drew up a statement containing the phrase "by any means necessary". It was circulated by email but was not supposed to be widely released until after it had been agreed by the Steering Committee.
At the Steering Committee itself one of the Socialist Party representatives drew attention to the phrase and objected to it vigorously. A discussion followed with the SP arguing that the the phrase should be deleted. It was felt that it would play directly into the hands of pro-war forces by giving the impression that the anti-war movement endorsed the beheading of civilians and other such actions.
Eventually the deletion was agreed and the edited statement was published without the offending words. So when German claims no statement has been released containing that form of words she is technically correct although she did try to release such a statement.