The Constitution is, as you stated, a red herring from the standpoint of one man violating another’s Constitutional rights because it regulates the government rather than the people.
Ignoratio elenchi or not, I can't make heads or tails of that sentence. In any case, this thread is about various states' "Stand Your Ground" laws, not a general civics primer. As such, yes, posting broadly about Locke and Blackstone is a bit of a red herring.
Let's stay on topic.