I agree with you, but you are going to have a really hard time making that argument with a lot of people. In fact, I believe John Paul II called moral relativism the greatest evil of our time or something like that.
In my opinion this thread is already littered with examples that morality is relative. Sure, if you have an invented set of ideological morality that is blessed with divinity, it's easy to believe in absolute morality. The wide variety of subreddits and topics covered in those subreddits contain a whole plethora of things that I think are unethical but are legal and vice versa.
I agree with you, but you are going to have a really hard time making that argument with a lot of people. In fact, I believe John Paul II called moral relativism the greatest evil of our time or something like that.