Let me try to explain how I see this by starting with scripture:
Rom 13:8 Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law.
Rom 13:9 For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if [there be] any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself.
Rom 13:10 Love worketh no ill to his neighbour: therefore love [is] the fulfilling of the law.
What I believe Paul is saying is that if we love our neighbors as we should, then we can't help but keep these commandments. In other words, the ten commandments are the written expression of a perfect, internal, holy love of God and others.
I agree. However, our focus should be on those old commandments. We are a new creation, under a new covenant, with new commandments. John 13:34, 1 Cor 7:10 (which differs from the OT), 1 Thess 4:1-8, 1 JOhn 3:23, etc.
America has many laws which have their foundation in English law, but we are no longer under English law. In the same manner, New Testament commandments have their foundation in OT commandsm, but we are no longer under OT law.