How American Horror Story Is Setting Up Ally to Be the Cult Leader

Yes, Ally suffers from phobias, but she will do anything to protect her family. It's clear now that Ivy purposefully sends Pedro to their home with at least some knowledge of what will happen to the poor guy. As horrible as it is that Ally shoots an innocent man, it also illustrates to Kai and the audience that if she feels backed into a corner, Ally will do anything to protect herself and her family. If she extends that blanket of protection to the cult, then they could become unstoppable.