Nobody is saying you MUST follow God’s laws. If you read the entire scripture on it you see that because a Real Christian is a changed, new person. Christians will LIVE in them. If you Love God with all your mind body and soul as Jesus said, then you will do what God wants and will obey him not because you want to to be saved - like it was under the Mosaic law for righteousness - but because you are a new creation filled with the Holy Spirit guiding you.
So why worry about the law and preach subjection to it? Do you not trust the indwelling of the Holy Spirit to guide?