Is It Natrual to have certain dreams¿

So. You Dream, I dream, There’s a Youtuber named Dream.

BUT what I am here to ask if It’s Normal To dream about Harming or even killing others¿ This been going on since Middle school, I would dream about killing my friends or some other People It’s Horrible when family is inovlved tho…, sometimes the dreams would involve Weapons i have out of nowhere ( ͠° ͟ʖ ͡°). I’m Sure It’s not all Bad. It’s Rather NOW i should say once's while. 

I use to scream in my sleep, That I don’t know¿ Just could be nightmares.

WELL THATS ALL FOR NOW UNTIL THE NEXT BLOG :P