Uhm...... I wanted to agree with that at first sight. But I don't think "circumcision" is the only fulfillment of the Law as "law" means Torah. All those commandments are part of the Law to be fulfilled, and all those words of the prophets are the prophecy.the Law has been "fulfilled.
Just as the lamb sacrifice of Exodus was fulfilled with crucifixion, passover, the feast of tabernacles, the feast of Trumpets and the feast of first-fruits among others must be fulfilled in like manner. Some may say they've all been fulfilled, but I don't see that, actually.