EdNotes Online has a piece on the knee jerk reactions from folks defensive of unions when they hear criticism. This site and some other folks went through this recently with critique of the NEA during their 2012 Assembly in Washington, DC.
I understand that far right-wing conservatives are after unions. I get that it might be uncomfortable that critique can come from all sides, even those like myself who are sympathetic with organized labor. Even in such a precarious political state, no one is immune from critique, especially when both the NEA and AFT take positions that seem more like appeasement than activism.
The gravity of the high-paid executive leadership might pull these organizations to more conciliatory positions. So, the membership is going to have to use their will and numbers to bring the entire institution away from the shiny objects of power and influence.