i was just wondering are muslims allowed to fight other muslims in self defense, even to the point where the opponent may be killed? and what about fighting to defend your property against muslims? the hadiths, dont lift a weopon against a muslim, if two muslims fight and one gets killed, then the killer and the killed both go to hell, and if muslim comes to our doorstep to kill you, be like the son of Adam, comes to mind those hadiths may indicate we should never fight other muslims...?