Re: Oh, dear...
I think you'll find that any culture that dominates it's planet/ food chain is going to be agressive. If it is space faring of heading that way, then it is a fair bet that carnivorous or other aggression is or has been driving it. If there are other world dominating species out there it will be well to assume they have or have had simbilar destructive histories to us.
Intelligent does not mean cuddly wuddly and friendly, it just means ( in our case) clever more aggressive monkies.