I agree with the others who've posted. Such emotions are perfectly natural, and it's good that you get to experience them within the safety of a dream. Also, at least you were able to do something with those violent feelings to release them. On the occasions when I experience something similar, I almost always am unable to hit or fight effectively. It's like those nightmares where you try to run but can't. And now

Unicorn, I love your sig. All you're missing is the rug!