The Turian Councilor is an idiot!

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1. After Noveria wheather you free the rachni queen or kill it, he gets angry, I mean what am I to do to keep you happy?
2. After Feros he's unhappy if you save the colonists and happy if you kill them!
3. At the ending if you save the council he applauds us for saving their lives and sacrificing our own, it's as if we're tools and he's only happy when we sacrifice ourselves for them!

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1. The rachni almost wiped out all the other races thousands of years ago. He has the right to be pissed off.
2. There's still some animosity between Turians and humans because of the war beteen them before the game when the two species first made contact.
3. Turian culture. Here's an quote from Wikipedia:

quote

A rigid code of honor and strict discipline are the hallmarks of any turian officer and soldier. This includes humane treatment of prisoners and conquered enemies. A turian unit will never willingly leave behind one of their own, no matter what the cost of going back to retrieve their comrade. Turian society in general is very honor-bound, concerned with the performance of one's duty, regardless of one's role in society.

It's kind of like the "no one gets left behind" mentality of a lot of militaries today.