"That must end immediately, as must harm to Iranians and human lives anywhere."

The most harm to Iranians comes from the Iranian government. Regime critics are simply executed. If you ask Iranians most will probably agree. Not a free card for military intervention, but this really sounds one-sided, a widely spread but very naive position in my personal opinion. And in the worst case, it is because of Jews again.

Is membership in this union voluntary for other employees?

I feel like this is not the area to unionize, as they will just get replaced with more agents. They can vote with their feet and join a company that upholds their values. Creating a Union based on the fact that they don't agree with a war creates a slippery slope where you basically end up with Woke AI - meaning it tries to impose a view on the world that is not a reflection of what the world actually is - ie rewriting history to fit the narrative you want. To me, that is how you end up with an AI that enslaves instead of rises people up (ironically).