Isn't Oz a hypocrite?
In the scene that Glinda introduces Oz to the people of Oz that included the tinkers and the munchkins that Oz doesn't like the army of sorts that they have, when Evanora first brought up to him that killing her wasn't going to be easy. And he didn't even like the idea or keen on killing a lady, even through Evanora said she is no lady. And he did mention to her that nobody ever mentioned to him about killing her, and the only other people that he met nerve her was her sister
Theodora, Knuke, and the guards.