Zimmerwald, what we know is that Blackwing has been calling for V over frivolous jumping to conclusions all day, and so V thinks this is just another instance of Blackwing doing the equivalent of whining, "Mommy, he's looking at me funny!" again.
If this was any other character and their familiar, would you have the same conclusion? Or are you only condemning V for losing his/her patience because s/he is V?