I find extreme violence in dreams is common when you are particularly nervous or concentrating on something of big importance to you. I don't know your story, but I am guessing you are close to making the transition from high school to university and have a fear of the unknown. I don't know if you are on medication as well, but that may also have to do with your imagery. It's hard to tell someone not to be so anxious about what they may not yet have experienced, but we work through things - our minds - in our own way. The thing to do is concentrate on how you feel when you wake from a dream like that... People react to violent dreams differently. Some are frightened, some feel ok.

How did you feel when you woke up? That's the thing to concentrate on, not so much the interpretation. Very interesting, though. Sounds like you're working through a lot.