They can whitewash their past all they want... does not change the fact that it is a trash company that brainwashes kids into thinking vengeance is justice. Watch any Disney animated film and you see the same cycle of revenge. The "bad guy" never gets any forgiveness or chance at rehabilitation. Usually they are killed off by the "good guy". Shit is trash that warps the minds of the simple.
Hey now, Simba told Scar to get the fuck out but Scar just had to go for a cheap shot at the end. Bitch got what was coming to him.
Gaston slipped and fell, so that's on him.
Tarzan warned Clayton to stop cutting the vines, but he didn't listen and end up hanging himself.
Aladdin merely traps Jafar in 1, and in 2 well Iago kinda had to kill Jafar lest he rule the entire world. Honestly 2 kinda shows that Aladdin should have been more ruthless at the end of 1, but Disney probably doesn't want their movie to end with Aladdin summoning Genie Jafar and telling him to erase himself from existence, might seem too harsh even if Aladdin was just being sure a potential world domination didn't happen.
If Mulan hadn't killed Shan Yu, he would have still been executed anyway for countless atrocities.
Hell itself decided it was Frollo's time.
Maleficent became Trogdor, and you don't hold back against Trogdor.
The Queen from Snow White was terrified by a bolt of lightning which caused her death. Mother Nature made that call.
Ratigan fell due to the clock he was on striking 10:00. Father Time made that call.
Cruella de Vil didn't die but she probably should have to teach kids the possible consequences of reckless driving.
King Candy died by becoming a mutation and then being undone by the creature's natural instincts.
Also, the villains of Pocahontas, Frozen, Big Hero 6 and Zootopia are arrested.
Really the hero or one of the good guys rarely kill the villain in a Disney film.
Personally I'd rather kids see the worst possible consequences of committing murder, starting needless wars, conspiring to murder, etc. than have the bad guy ultimately walk away with a slap on the wrist because they "feel bad about it" now. It gives a better emphasis on, "hey, don't do this shit, because look what might happen!"