Professor McGonagall is great, but whenever I read or watch the scene in Deathly Hallows where she forces the Slytherins to leave, I get so pissed off. She didn’t even bother to see if any of them wanted to fight and I’m sure some of them would have. That was an awfully biased thing of her to do. It’s not like all Slytherins are Voldemort supporters or that a death eater can’t come from any other house. It was a Gryffindor who led LV to Harry and then helped LV return to power, not a Slytherin.