The Reverend Diablo II rocks. Though, my paladin 'The Reverend' is only level 17. I think that any entity that equates lying and murder is pretty sadistic. That's just me, though. I see where you're coming from.
Murder applies ONLY to humans, whereas kill applies to everything else.
Therefore, it is not a sin to kill bugs, birds, animals etc. However, God gave us a responsibility to take care of the earth, so we aren't to go around killing things for no good reason either. I'm not Catholic. There are more divisions in the Christian Faith than anyone can count. It's Satan's favorite method to destroy a person's faith - cause the church to fail, cause the pastor to leave, and cause the person to dismiss God as just another myth.