If there truly were a war of all sects against all, one would expect that war would have broken out soon after Europe split into Catholic and Protestant factions.
The statement above is a completely baseless assumption. What is the basis for the assumption that the "war would have broken out soon after Europe split into Catholic and Protestant factions"? Why does it have to be "soon after"?
It's an assumption but not 'baseless'. He says:
"Two well-known examples involved the establishment of Lutheranism and Anglicanism. In the 16th century, Martin Luthers reasons for breaking with the Catholic Church were theological, but the Reformation would have been quickly crushed if it hadnt been supported by powerful European rulers whose motivations were primarily political and economic."
So the rulers kept things in check for political and economic reasons for a while. Then he says:
"King Henry VIII of England separated from Rome and formed the Anglican Church for pragmatic, nonreligious reasonslargely due to the refusal of the pope to grant an annulment of his marriage to Catherine of Aragon. He believed the Catholic Church was interfering with the internal affairs of his kingdom. He also wanted to nationalize the vast holdings of the Catholic Church in England to consolidate his power."
So there was a power shift away from the Catholic Church, not just theological. And the war wasn't even with the Lutherans:
"The Catholic prosecutor of the Schmalkaldic War, Holy Roman emperor Charles V, spent much of the decade following Luthers excommunication in 1520 at war not against Lutherans, but against the pope.
As Richard Dunn points out, Charles Vs soldiers sacked Rome, not Wittenberg, in 1527, and when the papacy belatedly sponsored a reform program, both the Habsburgs and the Valois refused to endorse much of it, rejecting especially those Trentine decrees which encroached on their sovereign authority. The wars of the 1540s were part of the ongoing struggle between the pope and the emperor for control over Italy and over the church in German territories (The Myth of Religious Violence, 143-44)."
Over theology? I don't think so.
This second one is even more telling;
Cavanaugh provides massive documentation showing that rather than the state being the peace-making force that eventually solved the problem of religiously motivated violence, the process of centralizing public authority in a secular state was itself the most significant cause of violence. There is a great deal of evidence to suggest that the transfer of power to the emergent state was a cause, not the solution, to the wars of the sixteenth and seventeenth centuries (ibid., p. 162).
Placing the blame on the state rather than dealing with the underlying cause of the Protestant Reformation is disingenuous. It was the advent of the printing press and the availability of the bible to the masses that enabled individuals to read for themselves what it contained rather than having to be told what it contained by the Catholic church.
So the author of that book was rewriting history so as to remove the blame from Christians warring between Catholic and Protestant and instead trying to find an alternative scapegoat.
He wasn't rewriting history, he was pointing some history worth considering. And in order to understand history the more you know the better you'll understand it.
"The historical evidence renders . . . the idea that the modern state saved Europe from religious violence . . . unbelievable. State building . . . was a significant cause of the violence. An important aspect of state building was the absorption of the church by the state, which exacerbated and enforced ecclesial differences and therefore contributed to warfare between Catholics and Protestants. In the process, the state did not rein in and tame religion but became itself sacralized. The transfer of power from the church to the state was accompanied by a migration of the holy from church to state (ibid., p. 176)."
Which lines up with history as I understand it. The "religious wars" seem to have started with Charles V, which looks more like a power and control (by the state) than a war over doctrine.
Martin Luther . The Characters . Charles V | PBS
Charles V settled in Germany and sought to become the leader of a universal empire. Through his reign he would face ongoing battles with France, resist the advance of the Ottoman Turks and for the sake of political expediency and inattention failed to check the Reformation.
Like many others, Charles underestimated the dissatisfaction of his Catholic subjects and the influence a humble German monk would wield through his defiant pen.
Despite being a devout Catholic Charles V was acutely conscious of Papal power and it was in his interest for the Vatican to be destabilised.
At the Diet of Worms Charles absolutely opposed Luther but did not rescind an undertaking that he could leave safely thus saving Luther from execution as a heretic.
Charles was soon preoccupied by battles with France and the Ottoman Turks and did not check the spread of Protestantism sweeping his Empire.
He spent the rest of his life waging war in France, Germany and Spain, indeed it was only after his death in 1558 that a peace treaty was signed with France.