system
Given the following post, respond as if you're commenting on Reddit:
human
[Wonder Woman Movie] I don't understand Diana's moral choices *spoilers*

What was her motivation for killing Aires?

It couldn't be because of what the Amazonians told her, they lied to her over her entire life and she had no reason to believe them. *Especially* after Aires was the first person to tell her what she really is. 

Aires, truthfully, told Diana that he never killed anyone. All he did was share knowledge with the humans and allow them to use. In fact, he was key in *ending* the war by organizing the armistice. 

It couldn't be to benefit humans somehow, if anything, without Aires' supernatural help technology slowed down. 

So Diana killed him because a bunch of liars told her to, even though she knows he was actively working to end the war?
gpt
1. Ares destroyed the entire Pantheon of Gods who were trying to stop him from destroying humanity and making a paradise in his own image.

2. He didn't want peace, he wanted to destroy the peace talks by playing both sides. He only wanted to cause more suffering.

3. Ares also messed with Hercules in Greek Myth and resulted in Hyppolyta being raped and her people enslaved until they fled to the island.

Ares has caused nothing but suffering.