There are many instances where a person is actively breaking into a home, forcefully and violently trying to enter a home, sometimes intoxicated and the police cannot come in time. It must be very frightening to have someone banging on your door in the middle of the night. In those cases i would hope a person had the right to defend oneself and often times people are too afraid to leave the house due to then removing the barrier that the perpetrator was trying to remove to begin with, and also they figure there may be accomplices. That said, i have read a few cases similar to that last example. Seems it would be cruel and unusual to have to allow people to force their way into your home. Many people wont see it that way unless, of course, it was them on the other side of the door. Then it would be ok.