"This is not going to fly..."

I ran into this quote on the blog of an agent representing romance novelists and wondered whether it would be true for Civil War readers. I have deleted the reference to her genre to make this what-if exercise readable. You be the judge:
This is not going to fly for [ACW] readers, especially not for a debut [book]. There are certain formulas writers need to follow for category [nonfiction], and as much as some readers might sympathize with [an alternative interpretation], it’s likely to offend a lot of readers, and this hurts the widespread appeal [to] the core readership of [the nonfiction genre].