If there is a God and we pick Christianity as his true revelation or another then how is whether his standards are objective or not meaningful. If they are we should obey them and are accountable for our actions. If they are subjective then we should obey them and are accountable for our actions. What differences does the label make. IMO they are objective but like I said who cares?
Since nobody in their right mind claims to know the exact nature and entire mind of God, the objectivity vs. subjectivity question applies to US, not to God. Objectivity means that our opinions on what is moral are based on empirically demonstrable facts, external to ourselves, that should lead
all people, regardless of their origins and beliefs, to the
same conclusion. Subjectivity means that each of us formulates our opinions based on nothing but our own abstract ideas and notions, or those that are shared by our immediate community. The empirical baselessness and cultural isolation of subjectivity leads to a
proliferation of very different ideas about what is true.
It's
your personal opinion that your God is real, and that his will can be known and should be obeyed. You have no empirically demonstrable facts that could lead others to make the same conclusion, and share your opinion only with other members of your community. IOW, your unfounded belief that God's morality is objectively true is a
subjective opinion.