[A.] In about half the states you can use deadly force against robbery, which generally includes any theft from the person that uses modest force or a threat: “Even a purse snatching can constitute a robbery if the victim simply resists the effort to wrest the purse away.” Some robbery of course does also create a reasonable fear of death or serious bodily injury, but in these states such a fear is not required.

[B.] In some states, there is a rebuttable presumption that you reasonably fear death or great bodily harm—and may thus use deadly force—if the target is (to quote the Iowa statute),

Unlawfully entering by force or stealth the dwelling, place of business or employment, or occupied vehicle of the person using force, or has unlawfully entered by force or stealth and remains within the dwelling, place of business or employment, or occupied vehicle of the person using force.

This is just a presumption, but to rebut it the prosecution would generally have to prove beyond a reasonable doubt that you didn’t actually reasonably fear death or great bodily harm in such a situation.