Seriously? She's been liberating slaves and fighting a war, of course she's going to have killed people. Which one of those examples is comparable to razing a city of thousands of innocent people when she has
already won the war. Was it the room full of Dothraki who were going to rape/kill her? The House of Undying who had her imprisoned? The wagon train which were y'know... an actual army?
This is the same woman who cried for a farmers dead son that her dragons had killed and locked them up because someone innocent died. The same woman that literally made a speech about how she wasn't going to KL to kill their children/wifes and said she would spare the lives of those who swore fealty to her.
Then when all was said and done and the war was over, her enemy had surrendered... she razes the whole city.
And people are all "derp check out this foreshadowing..."
Nothing foreshadowed that. She went from liberator to tyrant in about 1 hour.
Ffs I'm getting wound up now