Probably worth mentioning that BALPA is in reality for any given airline is the current CC for that airline. Whilst BALPA does have some over all policies it is the CC that have sway. So if the PPU are trying to destroy BALPA they will have to do it at each airline. Whilst BALPA is considered by many to be a union, it is in fact an association.
I often hear ***dy BALPA have done this or that, when in reality it is the elected CC that have done it. I.e your fellow pilots elected by you the members.
If you don't like what your CC is doing put yourself up for election to the CC next time around. Obviously you have to join BALPA to do that.