Is it normal to have a dream about killing someone?

ok so it was pretty weird. I'm 22 but I had this dream about going to summer camp where I went when I was 10. The same location and everything, and the buildings looked exactly the same as it did back then. Basically everything I remember from then I was doing again this time. From enjoying nature to hiking to canoeing and playing capture the flag in the woods. And we had lunch outdoors and slept in the cabins.

however, I was there with some of my classmates from college, for some strange reason. And I discovered that I had the special ability to become invisible. There was a guy who used to bully me so I cornered him in the bathroom and slit his throat with a knife. I was invisible and anything I touched including my clothes and the knife also became invisible, so he couldn't fight back. I had no idea why I did that but I couldn't really control my actions.

there was another guy who was in a relationship with a girl I liked but she didn't like me back. So I tried to stab him in the back with a knife but he heard my footsteps. (I was invisible but people could still hear me). It was a sunny day but my body didn't cast a shadow. He tried to fight me but he couldn't, then he started to run into the woods. I chased him for a while, then I heard him near the edge of the water catching his breath and wondering if I had stopped following him. I crept up on him and tried to stab him in the back again with my knife, but he heard me again and this time he kicked the air in the general direction I was approaching him from. He kicked my knee and I stumbled back in pain. Then he jumped into the water and tried to swim away. But I caught him and forced the knife into his back and he collapsed.

After I woke up, I felt terrible about this even though I knew it was only a dream. I felt guilty and wanted to check up on these guys in real life to make sure they were okay.