Subjective morality is ultimately simple preferance and ultimately just a battle of wills. I, and most other religious people, do not consider such a "moral order" to be morality at all.
Objective morality, with a judge above all judges who is justice itself, is the only way "justice" and morality mean anything at all.
I'm personally religious, but the myth of objectivity is a very, very dangerous thing; in masks the ways that man creates God in his own image.
I do not mean this as a flame, but I honestly do not understand why a person who believes in subjective morality would even discuss morality at all. If all morality is simply in the eye of the beholder, moral progress is impossible and it is not possible for one view to be superior to another.
To which I say: have at it. I'll get some popcorn. Too bad about all the bystanders. But I'm sure they'll be happy knowing that they died in the service of objective morality.