embryo=life but human=collateral?

isn't it interesting how when it is just a mass of cells multiplying it is morally reprehensible to use it to save countless thousands of people - referred to by Bush himself as murder; yet when it becomes a fully functioning human being it is perfectly ok to send them off to war to die, or drop bombs on them as civilians and they are then referred to as collateral damage. How exactld oes that make sense again? Cells have more basic human rights than...humans?