Isn't it so interesting that when Umbridge is introduced, the point is kind of that evil people come in more forms than just Voldemort's henchmen, and that a racist monster who tortures children can actually fit just fine into the current power structure and still oppose Voldemort? And then Deathly Hallows comes around and it's now, nope, Umbridge is a Death Eater, everyone evil is a Death Eater and Voldemort supporter, you're either with us or against us, and if you're against us it's totally fine for us to use these Unforgivable Curses on you. It's like you can see Rowling's understanding of the world getting worse and more black-and-white in real time.