>>So you think the commandment against murder is no longer in effect? Or any of the rest of the commandments?<<
Far from it. Paul argues this much better than I can. Actually, Jesus made them even more difficult with his remarks about things like hating your brother (murder) and looking at a woman in lust (adultery). He clarified in those remarks just how valuable His sacrifice is, and just who needs it.
So if the law remains in effect and Paul does call it our school master and Christ says to say (teach) other wise is enough to make one last in the Kingdom of heaven, then what does fulfill mean?