Ben, no I am not (although bnei Noach can be executed for theft, leaving aside what constitutes theft, and ever min chai).
Think, the concept of “nekudat habechira” only refers to how Hashem judges the person not how we must deal with him. If Rambam’s definition of a sheid refers to a psychopath it could be that he has no reward or punishment like an animal. However, that does not mean that we need not protect society from him just as with any vicious animal.