He drank the kool-aid. Maybe he is just fighting them over there so he won't have to fight them over here?

Quisling excuse # 37. The "I am sooo liberal I can use my powers of good to promote the darkside which won't affect the balance in the force" excuse.

Keep talkin' "Anakin" Mele.

Anakin: What has that got to do with anything?
Yoda: Everything! Fear is the path to the dark side. Fear leads to anger. Anger leads to hate. Hate leads to suffering. I sense much fear in you.