Nice try.Circumcision is necessary, yes. In the olden days it was physical but Paul has instructed us otherwise and now we know it to be spiritual as the above posted verses illustrate - and the spiritual nature of it was at the heart of that first covenent as well. That doesn't change the law; however, because the intent was the same.Christ changed that we can receive forgiveness when we ask forgiveness and our sins will be blotted out. As Christ said, the law didn't change, he only fulfilled it by bestowing the Grace of God upon us. If we accept Christ, we will be forgiven for the transgressions of the law that we make. No longer are we held to every single law because none of us can keep them, we now have the all-time sacrifice of Jesus Christ through which we ask forgiveness. That doesn't mean you don't follow the law and attempt and live by it - you should follow the law because it's His law and doing so is the instruction of Jesus himself, nevermind the Apostle Paul. The difference is when you in that commandment you're not removed from heaven as some religions would have us think; that by no means makes the law null and void.Going by your logic, it'd be okay to bow down to another god but then come back to Jesus because Thou shalt have no other gods before me no longer holds any water.