Are you intentionally misunderstanding the issues here, or do you really not understand the difference between a combatant and a non-combatant?
Read the treaty, and tell me in what universe a person could be considered a combatant strictly by being related to a terrorist? Do you include children as well?
The bible sometimes did.
To declare war on ISIS with ISIS claiming to be a state and yet not being a Geneva signatory should mean very bad juju for ISIS. Geneva was supposed to be a shield for voluntary participants. Not an all excuser for the literal whole world no matter what transpires.
For humanitarian reasons we could CHOOSE to try to avoid the “women and children” problem but face it, some of these kids are sent out with weapons at absurdly young ages.