I don't think Snape would have killed McGonagall. I think he was stalling for time, so someone (Flitwick) COULD cast a spell on him so he wouldn't kill her. I think he was trying to spare her life.
However, I DO think McGonagall would have killed Snape, seeing as she thought he was a Death Eater. Dumbledore never told her the plans, and I seriously doubt she would have stopped the duel to ask Snape why he killed Dumbledore, don't you?
|