We don't have a right to defend ourselves if defending ourselves leads to lawsuits and jail/prison time. If I shoot someone for entering my home unwelcomed, I didn't commit a crime, I defended myself and my property. But I would almost certainly get jail time. It's like putting a gun to my head and saying your choice but either give me your money or I'm going to shoot you, I don't really have a choice. The aggressor is the one entering a home they aren't welcomed in, why does the defender get punished?