If they're not already IATSE (which I'd assume they are), how would that help here? IATSE members all over the continent are out of work right now, being represented doesn't change that. Nor does it change how much it sucks to get jerked around by twits like this.
IATSE isn't part of the strike. Most likely because AMPTP would find a way to make American Gladiators with non-union labor, which would be a body blow to the union.
If you're IATSE, you're working right now, because the union isn't on strike.
Edit: upon re-re-re-reading your comment, I now think you're saying that the crew got fucked over, which I wholeheartedly agree with.