Lets ask a different question then: How is the owner whose house is being broken into supposed to know whether the intruders intends to harm him or not?
Should he call out to them and ask if they intend to harm him?
And if they say "Yes!" (very unlikely as they would probably harm him first and then answer questions afterwards) what then?
And if they say "No!", are they to be believed, considering that they are already in the progress of harming somebody by violating their home?
(no, I am not in favour of shooting people on sight, just curious about your answers)