Ah, the All Opinions Are Valid school of thought.
Three problems with this belief:
1)
2) Those like Rafmed claim to believe that "all opinions are valid," but they can't POSSIBLY mean it. Otherwise, they would never criticize anyone else's opinion. Ever.
What they really believe is "all opinions are valid, except for those that believe otherwise." That's a BIT different, and it seems like a very arbitrary line to draw.
3) In the end, nobody REALLY believes this brand of subjectivism, anyway.
Rafmed claims that "I only know that I don't know anything." I don't think he really believes it.
First, I bet he believes such obvious truths as "1+1=2." Beyond that, if someone wrongs Rafmed - takes something that belongs to him or lies about him - I bet he REALLY thinks that an objective moral law was actually broken.
Otherwise, most humans would never appeal to things like "fairness," would never try to explain to the other why his action was wrong.