Here we go again.
You can not use deadly force to protect property and you must have reasonable cause to believe that a person has the ability, opportunity and intent to cause you or a third person serious harm.
The Castle Doctrine and Stand Your Ground laws simply mean that you are no longer required to escape from the situation if you can do so without increasing the threat to yourself.
If he has the power to kick down my door than he must be a strong mofo hopped up on crack cocaine.