Plodding Along,
You oversimplify at the expense of a large number of crew who have done nothing but steadfastly support BA throughout this dispute. Many have signed the agreement as they were no longer members of the union through choice at the time the deal was offered. Unionised members couldn't be offered it by dint of legal restrictions on offering incentives to operate outside the union remit. That the union itself has not put the majority of offers made to the members directly is not the fault of Betty Girl and the many crew like her.
I'd suspect, like my wife, those that left the union did so knowing that there was no way of changing BASSA/Amicus from within when such a stentorian core of reps/members would resist anything other than the retention of the status quo. It doesn't mean, however, that those who went to work deserve anything less than a fair modicum of respect.
MrB