Any people can get as defensive as we can get - angry, strong, determined.
But it is desperation that creates such bad-will actions.
Advanced races do not have any of the basic kinds of desperation that we humans live under daily.
Ask whether any person in the Universe might steal or fight or kill for food to feed himself or his starving family.
I would think yes probably anybody.
Maybe some would and some would not, but it would be hard to guess of any individual until you saw them in that situation.
In this analogy, none of the advanced races is starving for food, so my answer would be, Yes, they can get as aggressive as we do, but no, they do not get as aggressive as we do.
They don't have to because they have overcome those things already.