You are the one who began the muddled quibble about the definition of fractured. I am merely arguing that "fractured" is an accurate description of the current state of affairs, and if it were resolved per your hypothetical illustration through the undecided changing into decided -all on the same side - then it would no longer be fractured.
First, I didn't begin this stupid argument. I was just the first to point out how stupid it was. Second, if the only way you can support your contention is to assume "undecided" voters are "clearly against" something, then you are probably doing enough work to prove how stupid the argument is without my help. Enjoy yourself.