Refresh my memory. . .where does the NT command believers not to abuse their parents or not to lie, etc.?
Or are they the necessary consequences of what the NT does command?
OK...
Mar 7:9 And he said unto them, Full well ye reject the commandment of God, that ye may keep your own tradition.
Mar 7:10 For Moses said, Honour thy father and thy mother; and, Whoso curseth father or mother, let him die the death:
Mar 7:11 But ye say, If a man shall say to his father or mother, It is Corban, that is to say, a gift, by whatsoever thou mightest be profited by me; he shall be free.
Mar 7:12 And ye suffer him no more to do ought for his father or his mother;
Mar 7:13 Making the word of God of none effect through your tradition, which ye have delivered: and many such like things do ye.
And so with observance of OT laws in light of the commands and revelations of Mt 22:37-39; Heb 7:18-19; Mt 22:40; Ro 13:8, 9, 10.
The issue is your assertion that they are still commanded by God, and have not been set aside (Heb 7:18-19) as the revelation spoken by the Son in these last days (Heb 1:1-2) through the NT writers states, the issue is not that you choose to observe them.
What does it mean to hang a picture on the wall? Does that do away with the picture? The Law and the Prophets are humg on the Two Great Commands. That do away with them does it?
Albert Barnes...
On these two commandments hang ... - That is, these comprehend the substance of what Moses in the law and what the prophets have spoken.
What they have said has been to endeavor to win people to love God and to love each other. Love to God and man comprehends the whole of religion, and to produce this has been the design of Moses, the prophets, the Saviour, and the apostles.
Adam Clarke...
On these two - hang all the law and the prophets -
They are like the first and last links of a chain, all the intermediate ones depend on them. True religion begins and ends in love to God and man. These are the two grand links that unite God to man, man to his fellows, and men again to God.
Love is the fulfilling of the law, says St. Paul, Rom_13:10; for he who has the love of God in him delights to obey the Divine precepts, and to do all manner of kindness to men for God’s sake.
John Gill...
On these two commandments hang all the law and the prophets. Not that all that is contained in the five books of Moses, and in the books of the prophets, and other writings of the Old Testament, is comprehended in, and is reducible to these two precepts; for there are many things delivered by way of promise, written by way of history, &c. which cannot, by any means, be brought into these two general heads: but that everything respecting duty that is suggested in the law, or is more largely explained and pressed in any of the writings of the prophets, is summarily comprehended in these two sayings: hence love is the fulfilling of the law; see Rom_13:8. The substance of the law is love; and the writings of the prophets, as to the preceptive part of them, are an explanation of the law, and an enlargement upon it: hence the Jews have a saying (c), that "all the prophets stood on Mount Sinai", and received their prophecies there, because the sum of them, as to the duty part, was then delivered. Beza thinks, that here is an allusion to the "phylacteries", or frontlets, which hung upon their foreheads and hands, as a memorial of the law. And certain it is, that the first of these commands, and which is said to be the greatest, was written in these phylacteries. Some take the phrase, "on these hang all the law and the prophets", to be a mere Latinism, but it is really an Hebraism, and often to be met with in the Jewish writings: so Maimonides says (d),
Matthew Henry...
2. Observe what the weight and greatness of these commandments is (Mat_22:40); On these two commandments hang all the law and the prophets; that is, This is the sum and substance of all those precepts relating to practical religion which were written in men's hearts by nature, revived by Moses, and backed and enforced by the preaching and writing of the prophets. All hang upon the law of love; take away this, and all falls to the ground, and comes to nothing. Rituals and ceremonials must give way to these, as must all spiritual gifts, for love is the more excellent way. This is the spirit of the law, which animates it, the cement of the law, which joins it; it is the root and spring of all other duties, the compendium of the whole Bible, not only of the law and the prophets, but of the gospel too, only supposing this love to be the fruit of faith, and that we love God in Christ, and our neighbour for his sake. All hangs on these two commandments, as the effect doth both on its efficient and on its final cause; for the fulfilling of the law is love (Rom_13:10) and the end of the law is love, 1Ti_1:5. The law of love is the nail, is the nail in the sure place, fastened by the masters of assemblies (Ecc_12:11), on which is hung all the glory of the law and the prophets (Isa_22:24), a nail that shall never be drawn; for on this nail all the glory of the new Jerusalem shall eternally hang. Love never faileth. Into these two great commandments therefore let our hearts be delivered as into a mould; in the defence and evidence of these let us spend our zeal, and not in notions, names, and strifes of words, as if those were the mighty things on which the law and the prophets hung, and to them the love of God and our neighbour must be sacrificed; but to the commanding power of these let every thing else be made to bow.
Seems these all understood that the Law and the Prophets were summed up by and encompassed by the Two Great Commands, yet you state that all the Law and the Prophets were done away by the Two Great Commands.
It is a tough choice, but I gotta go with Barnes, Clarke, Gill and Henry.