Hey OP, something similar has been happening to me, but the dreams have been of a less violent nature than yours.
I used to never dream, but around a week or two ago I started having very vivid, very realistic dreams every single night, with some of them seeming to last hours or even days. I wake up every morning now and it feels like what I went through wasn't a dream but in fact reality- sometimes I have difficulty remembering what happened the day before due to the length of the dream, and other times I have trouble telling between what I dreamt and what I experienced in real life. Some of the dreams later manifest themselves in real life- in one of them, I woke up, got dressed, and began talking to my family over breakfast. I proceeded to wake up for real and have the same conversation that I had in my dream unfold before me.
The reason they are similar to yours is that occasionally they also take on a highly violent nature. I've also been feeling more aggressive in real life, itching for a fight so to speak.
Also interested in what's changed, seeing as I've been mostly passive my whole life, dreamed rarely (and they were always strange, abstract dreams that were highly predictable) and my routine has not changed at all in the last few days.
Maybe someone can come in and shed some light on this? Also OP, describe what kind of life you live, daily routines etc. Do you play any sports? Do any drugs? Maybe we've got something in similar.