Thanks for explaining your position. One nitpick, if rights only exist when/where they are given, then they can't be "inalienable". You believe rights are alienable (able to be removed).
But I agree with you totally about the importance of fighting for rights to be extended politically, recognised and not violated.
In the end, it doesn't much matter whether you think people have rights from an ethical point of view or if you just think they should be given them - we both want the same outcome.
The only problem arises if there is a group of people you want to take human rights away from.