> you can only use deadly force against an imminent deadly threat
This varies by locale. In Texas, in a situation where the use of force is permitted, the use of deadly force is permitted to stop arson, burglary, robbery, aggravated robbery, theft during the nighttime, or criminal mischief during the nighttime.
Most states permit the use of deadly force to protect against serious injury, not just a deadly threat.
Self-defense and defense of property are related, but not the same. The castle doctrine doesn't change the rules on self-defense; it permits similar use of force in non-self-defense scenarios.
Specific facts of each case will matter, but things that cause serious injury tend to get into the life-threatening realm.
This varies by locale. In Texas, in a situation where the use of force is permitted, the use of deadly force is permitted to stop arson, burglary, robbery, aggravated robbery, theft during the nighttime, or criminal mischief during the nighttime.
Most states permit the use of deadly force to protect against serious injury, not just a deadly threat.