then how do you separate circumcision from the Law, because we are told in several Scriptures to not bother getting circumcised...
obviously the Law has nothing to do with salvation, and in that sense it is "terminated" because it's primary function (the condemnation of the disobedient) is no longer functioning for a Christian, because we are free from condemnation.
Perhaps you do not understand circumcision...
Deu 5:29 O that there were such an heart in them, that they would fear me, and keep all my commandments always, that it might be well with them, and with their children for ever!
Deu 10:16 Circumcise therefore the foreskin of your heart, and be no more stiffnecked.
Prophetically speaking...
Deu 30:6 And the LORD thy God will circumcise thine heart, and the heart of thy seed, to love the LORD thy God with all thine heart, and with all thy soul, that thou mayest live.
Deu 30:7 And the LORD thy God will put all these curses upon thine enemies, and on them that hate thee, which persecuted thee.
Deu 30:8 And thou shalt return and obey the voice of the LORD, and do all his commandments which I command thee this day.
There is a time when Israel will have a heart to obey.
God has always intended that His people be circumcised...
Rom 2:28 For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh:
Rom 2:29 But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.
And as we read in Deuteronomy, He has always intended that it be of the heart.