You invite your friend to your home for a party. Your guest walked to your home. A blizzard starts outside. Your friend does something that pisses you off. You kick him out of your home, into the blizzard. He dies as a result.

Were you just asserting your property rights or did you commit murder?

When you tell your guest to leave, and they won't, or they don't have anyone to pick them up, and you wanted them gone, you would forcibly remove them from your home and place them outside.