For someone who even defines this entire reality and our existence as something "subjective", it is first subject to God, then us, etc...
I believe the True God should define all the morals that we should all have in common as a/the human race, etc, because without that, it really does all seem subjective to us, as we are right now divided by cultures and races, etc, with different sets of morals for each, etc...
Oh, and if even reality itself is subjective, then it has to have a One to be subject to, or it would be completely undefined and wouldn't exist, etc...
And that's also what I believe as well, that reality itself would be undefined and wouldn't exist, and would be emptiness or nothingness, without the subjective viewpoint of another, etc...
A.K.A. "God", etc...
God Bless!