What does it mean if you dream of randomly stabbing people but you know you're wrong?

First, the dream has nothing to do with you actually going around stabbing people, so if that is causing any concern, you can let that go. You have experienced something like this in the recent past: You have been disappointed by someone, maybe even badly hurt by someone who you thought was a friend. I suspect the hurt has to do with something someone said about you or to you. It's also possible that you disappointed or hurt someone else, more than likely (but not necessarily) with Words. If any of the above sounds like the dream is hitting on something, see if you can talk with the people involved and clear the air.