What was the bitterest controversy of the Protestant Reformation, between Protestants and Catholics and also between different Protestant denominations, the one that had both sides calling the other not just heretics but devils?
Answer: It was not Justification by Faith, the hallmark of the Reformation. It was not the relation between religion and politics, even though that was a matter of life or death . It was not about the sufficiency of the Bible, or the corruption in the Church, or the relation between the Bible and the Church. It was not about the Pope, not about Mary or saints or angels or Purgatory.
It was about the Real Presence of Christ in the Eucharist. God truly present in the Blessed Sacrament.
Jesus-Shock, in addressing this controversy forcefully and faithfully, shows the reasons why to this day the name of "Jesus" stirs up controversy, even revulsion, in polite society. In the true spirit of ecumenism, it also points the way toward a true rapprochement among His modern-day disciples.