I'm thinking of hurting people but despite that I have never acted on it.
In what ways do you think of hurting people?
I want to stab people, but I know I wouldn't do it.
It's understanable that you are concerned about your violent thoughts. Although you know that you wouldn't act on those thoughts, you should seek help in understanding why those thoughts surface. This will help you to understand what is triggering those thoughts.
I'm curious if I like the thought of stabbing people or if it is something else why I think this way.
The only way to find out is to seek professional help and to get it solved.