The man must be reminded that he did not demand more than two options. He did not demand a system that guaranteed more than two options. He allowed the Excrement Party to bring forward feces as it's candidate, and he allowed the Bark Party to bring forward manchineel as it's candidate.
The man is entirely responsible for this situation he finds himself in unfortunately. Also, if the man selected feces the first time round, and suffered for it, then maybe the deadly poisonous bark is the only other logical choice, if only to stop the torture?
The offerer of two choices then makes the man choose between his daughter getting shot and his wife getting shot. “Remember now”, he says, “whoever I shoot will not be killed by me but by you.” The Offerer cackles. “You could have prevented this from happening if you had only worked harder to thwart my first supervillain move fifteen years prior. You are entirely responsible for this situation.”