dropoffyourkeylee, you're absolutely right. The problem is that the JW contractor is between a rock and a hard place. If he fulfills his legal duty and doesn't discriminate against another church who has hired him, he'll be disciplined in some form, perhaps even disfellowshipped, if someone in the WT hierarchy told him not to. He can't sue the Borg because basic religious freedom principles allow a religion to pick and choose who it's members are.
If he chooses to follow the Borg's instructions, he'll be sued by the contracting organisation for illegally discriminating against them. He can't further sue the Borg because, after all, he willingly followed their recommendations.
It's a lose/lose situation for the poor JW contractor. Of course, he could always hide behind the corporate veil
Brother Smith: It's not me contracting with that church, Elder Jones, but Brother Smith LLC. (Brother Smith smiles an innocent smile)
(Stoopid autocorrect turned "Borg" into "Body" π)