Dan Brown's The Lost Symbol: Order in the Chaos

Just read an otherwise hilarious time magazine review of Dan Brown's Lost Symbol: Order in the Chaos. I got stuck with the second para though:

.... In other words, The Da Vinci Code recasts the history of Christianity into something that looks a lot more like the history of ... Islam, wherein an early schism took place between the Sunnis and the Shi'ites. Could the book's passionate following in a predominantly Christian America express a secret, even unconscious sympathetic identification with Islam? Or a repressed desire for Christianity to have a less boring, more Islamic history — richer, darker, riven at its root by an exciting sectarian war?

Lev Grossman conveniently ignores the various established schisms in early christianity including the extermination of Arianism, and attributes "sectarian war" to Islam alone. What about the later Christian schisms and the related conflicts? The roots of the Sunni-Shiite conflicts in Islam did not lie in as serious theological distinctions. While Dan Brown's arguments bear no significant merit in the historical exploration of Christianity, it is very unscholarly to perpetuate unfortunate myths.