CH,
Matthew 5:17-20 states 17 “Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. 18 For truly, I say to you, until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished. 19 Therefore whoever relaxes one of the least of these commandments and teaches others to do the same will be called least in the kingdom of heaven, but whoever does them and teaches them will be called great in the kingdom of heaven. 20 For I tell you, unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven."
We see here clearly that the law is to be followed until heaven and earth pass away. The Pharisees were watering down the Law and Christ has come to bring it to it's fullness. Notice, Christ is referring to the Law and the Prophets.
CH, you keep referring to the fact that you can point to history. Remember, history is what WAS and not necessarily what SHOULD have been. In my post that you ignored I said that many espoused monasticism to get away from the 'world' but that is not Biblical.
You state that Christ fulfilled the ceremonial laws and national laws. Where do you get your Scriptural reference for 'national' laws being fulfilled? Paul mentions much about civil government and the just ruler of it and that includes using the sword. Sounds like Christians can and should be involved in the civil process. Just because God doesn't not choose to have an earthly literal nation He still lays ground work on which to govern by. He did the same for gentiles in the OT days.
Again, there are sins that are not mentioned in the NT that one has to use the OT to condemn them. To use your presupposition one cannot
consistantly even call them sins.