You are correct - it varies by state. The “Castle Doctrine”, which ostensibly gets its name from the phrase, “A man’s home is his castle”, states that you may use deadly force if someone is in your home uninvited or is in the act of breaking into your home. In Texas, that has been affirmed by the courts, and extended to provide that I can use force, including deadly force, to protect my person, family and property from others.
Not just your state, but your county and city/town. For example, regardless of the laws, if you get into that kind of situation and you have a Second Amendment police/DA, there’s a damn good chance they’ll say “have a nice day” and that would be it.
But live under Blue government, you may well be perfectly in your rights to defend yourself, but that doesn’t mean that the cops/DA won’t make a ‘mistake’ and cost you a huge amount of money in attorney’s fees.
That's not correct. The Castle Doctrine means you don't have a duty to retreat from your home before using otherwise justified deadly force. But it still must be otherwise justified.
There is no law - ANYWHERE - that allows you to shoot someone.
Castle doctrine means that if you do have a righteous shot on someone you can prove has a reasonable ability to harm you or someone else that you will stay home, with your guns, until your court case.
Otherwise you would instantly be arrested, have your guns taken, and require bail to be out of jail before your court date.
I repeat, and you must listen to me, there is NO law that allows anyone to kill another. Period.