That is not a given.  If there are those opposed to war because people are killed, despite your belief they don't have the right to refuse to not support this form of killing, because you don't deem it important enough does not mean your opinion should be law.  If you want wars to be how we secure our country and its government and you want people to pay for that choice and the majority of voters agrees, then you have to pay when the majority of voters demands that birth control be allowed to women because many need it medically or for other reasons.  Democracy is about supporting the majority voice not just your conservative voice.