"Amen. If I have to die a horrible, pain filled death to keep them alive... I'd consider it a good trade."
OK, this makes sense. I'm sure the bad guys would agree to leave the rest of your family alone if you'd only agree to suffer a pain-filled death. Would you bargain with them before you did it? "Hey guys, if I attack you now will you just let my wife and kids go?" Or would you just assume they be really decent about it?
Yeah... That works so well.
Don't be an idiot.