I'm not just talking about people who wronged me, this includes people I've never met. I don't think I'm a sociopath, I like my cats. And some people. My dad was abusive. Sometimes I want to find a crowd of people and be done with everything. I feel bad for thinking like this, right now. I'm hoping this is a normal thing that most people just learn to ignore as time passes.

A lot of teenagers think this during their teen days, so if you're a teen, I'd say it's normal, sometimes people move along from this thinking later, though.
I once heard from a psychologist that the all thoughts are normal, they only become abnormal if you become fixated on them and dwell on them.
I think the bigger question is why would you want to kill someone you don't know?
I'd kill myself before killing someone else.