Oh my God!
What a clueless tool.
ALPA will prevail in an appeal on that matter, if it ever gets to that. ALPA did NOT fail the TWA pilots. The APA screwed over the TWA pilots, and the aftermath of 9/11 rubbed salt in the wounds. But ALPA did nothing that they are alleged to have done.
But as to your question of what should happen in the event that a union actually does violate its duty of fair representation, the members should seek to recall the officers who took part and take action to ensure that it doesn't happen again. Stealing money from fellow members is not a suitable solution, however.
What a clueless tool.