ORIGINAL: dbcisco
I don't think anyone was suggesting murder. However the law in Texas and PA (at least) allow the use of lethal force under certain circumstances. You don't have to use it. Just like you can drive a car or choose to walk. Some folks would even rather be murdered than defend themselves (the Amish for example). Just like police can shoot people under certain circumstances however they (usually) try all other solutions first.
All states allow lethal force under certain circumstances. Most do not allow you to kill if say they are stealing from you or destroying property. Some do. But even in Texas the trespasser must be at least appearing to be stealing or destroying property.