Ah, Jazzy, you're forgetting that BA Cabin Crew ARE BA (it says so on BASSA!). Therefore by backing BASSA some people think they are backing BA. They seriously believe that they are guardians of BAs product and service, not simply employees. Logic isnt a feature.
Add in the fact that the vast majority of BA crew worked during the strike and you have to wonder if its BA who are actually backing the majority of BA crew and not BASSA.