Interesting.
From talking to some of my friends at CA back before the vote, I understood that some of the EJ guys were simply not going to vote because they thought it was CA's fight and not theirs... Understandable, I think, as it seemed that few of them were looking at CA as a long-term proposition.
Actively and vocally campaigning against it, however, seems like a strange tack. It seems likely that if you are shouting NO to ALPA, that word might get back to the union and your position at EJ (if you chose to go back) might be compromised.
If I had to guess, I'd suspect that any former EJ pilots who were outspoken against ALPA were likely short-timers at EJ and felt that "hey, the union didn't keep me from getting furloughed, so what good did they do for ME?" I'm not in their heads, but I will admit to having felt the same way about ALPA after my short time at another ALPA carrier. I wouldn't be surprised if that was the motive.
In any case, you are definitely right about avoiding a witch hunt. I hope you have ironclad info about an EJ recall from CA before you try to get them booted. Hopefully they are smart enough to simply stay at CA and not go running back to Houston when their number is up, leaping feet-first into a cauldron of their own making.