The homeowner just committed a crime in the example you replied to.
Ted said nothing about the visitor displaying a firearm. They simply knocked, informed the homeowner of a dead dog and the homeowner then points a gun at the visitors head.
The visitor has the right to defend themselves once the homeowner brought firearms into play. People in Indiana do not have a duty to retreat.
Knocking on a door does not equal attempting to break in.
We may not like traveling salesmen but we are not allowed to point firearms at them for knocking on our door.
Perception is a strange animal.
We on INGO are critical of those who call 911 upon the gun owner who is OCing, but often equate the 3am knock on the door as an attempt of an armed intrusion.....or excessive police force.
In reality, everyone has a right to defend themselves, but there are smarter ways to doing so than by brute force. By the letter of the law, it will likely be found that all parties were correct, and all parties were wrong.