Wrong: Unjust, untrue, incorrect, dishonest, immoral.
You made a statement that was outrageous on its face. You said laws have nothing to do with what's right or wrong... do MOST laws fit the definition above? How about 50% of them, since you believe in the arbitrary nature of societal norms and law? I question both your original statement and the relativist's canard that there aren't moral absolutes.
But since this is an abortion thread, we can go back to "is murder wrong?" I'm certain you are a decent person who thinks murder is wrong. So, perhaps be more tolerant of people who tote signs calling abortion murder. I would never do so--I think people who have abortions are sometimes being grossly selfish and other times, scared, hurting, poor, alone... but be more tolerant of people who abhor murder the way you do.
If you want to tell us all that murder and rape are subjectively wrong, I will lose respect for you.