It is not an ACCUSATION... it is my conclusion by inference. <COFFEE need COffee!> SO here is the thing Ben... you go buy some bibles, rip them in half at the OT/NT division and give the OT to non-believers.... and tell them this is going to LEAD you to Christ. Now, how LONG are they going to have to live in the OT before they meet CHRIST???
The moment they realize they can't save themselves. They come to an awareness they are in need of the Savior. I am not saying you should separate the two as mutually exclusive in coming to the knowledge of Jesus Christ, they pair well to bring about a revelation of Jesus. However, we do not combine the old and new covenant. They are not something to be combined, you do not put grace into Law, though God did impart mercy. You cannot set rules and regulations in an atmosphere of grace, it sucks the air right out of liberty.
He isn't throwing out the Old Testament, it has its purpose. It leads men to Jesus Christ, it reveals their complete inadequacy to save themselves. It is but a shadow of what has come. That is, Jesus. So it is important, there are things to learn by it. It, however, cannot be combined and joined to the new covenant as something to be fulfilled by our daily actions. That is done by grace, imputation, and a renewing of our minds to who we now are in Jesus Christ, and having the fruit of the Holy Spirit.
People will say only the ceremonial laws were "done away with" but the moral law of the Law still stands. That isn't completely true, all of the Law has been nailed to the cross and Jesus fulfilled all of it to then impute His righteousness to us. Yes, there are moral absolutes, but again, the fulfilling of these absolutes by our daily living while beneficial by no means saves us. We are saved by grace through faith in Jesus Christ.