A small note: I don't consider myself a moral relativist, though I understand why my statement was misunderstood as such, as I was vastly simplifying my position. My actual position on morality probably needs a full discussion post to be fully explained.

I do think that for any X, X can only be called "morally wrong" according to some moral/ethical system, but I also think that there may exist objective criteria which might invalidate some moral/ethical systems altogether, or even rank (at least somewhat) the validity of the various moral/ethical systems.