In an article published by GotQuestions https://www.gotquestions.org/Christian-law.html, “Do Christians have to obey the Old Testament law,” there are several theological errors we need to look at.
The article says the law was given to the nation of Israel, not to Christians.
It is correct to say that the law was given to Israel, but according to Paul in Romans and the book of Isaiah, everyone who believes in Jesus is grafted into Israel. This is why Paul says several times over in his letters; you used to be a heathen outside of the commonwealth of Israel but now that you believe you are a part of Israel. So if the law was given to Israel and not to Christians, but Paul says we become Israel by faith in Jesus, then the law was given to us who believe in Jesus.
The article said that when Jesus died on the cross, he ended the old testament law.
If this is true, then we have a problem concerning what Jesus says in the Gospel of Matthew. Here in Matthew, Jesus says the law applies as long as there is a heaven and earth. In the book of Acts, Paul says he was falsely accused of teaching gentile and Jewish believers the law no longer applied to them. Every time he was charged with this, he proved his accusers wrong. What about the scriptures from Romans, Ephesians, and Galatians that the article gives as proof that Jesus ended the old testament law? This is not referring to the written law of Moses but to the oral law of Moses. In Jewish society, there are two laws, the oral and the written law, which Jesus refers to in Matthew 23 and Peter in Acts 15. The law Jesus put an end to was the oral law of Moses.
The article says we are under the law of Christ from Galatians 6:2 and Matthew 22.
The law of Christ is a word-for-word quotation from the written law of Moses. In the written law of Moses, loving God and loving your neighbor as yourself are the two most important commandments. In Matthew 22, Jesus says the Torah (the written law) explains how we are to love God and our neighbor.
The article says the Old Testament law is a unit; either all of it applies, or none of it applies.
There are about 613 commandments in the law; some are just for women, some for men. Other commandments only apply to priests, kings, and lepers. James 2:10 does not say a man has to live by the menstrual commandments for women or he has failed at keeping the law. What James 2:10 says is this; if you choose not to obey one commandment applicable to your gender and your situation, God sees it as if you have chosen not to follow any commandment.
The article says the Sabbat commandment is not repeated in the new testament.
The Bible says the Sabbat commandment is an eternal commandment for all generations. Jesus speaks of the Sabbat several times and even teaches his disciples to obey it.
The article says the purpose of the law is to convince people of our inability to keep it.
1.John 5:3, 1.John 2, James, 1. Chor 11, Acts 20, 26 says it is easy to keep the law. Jesus and His Father say it is easy, not burdensome, to keep the law.
The article says that God never intended for the law to be the universal law for all times.
The Bible says, in the Old and the New Testament, the law is an eternal law that applies as long as there is a heaven and earth.
After reading this article from GotQuestions, I wonder if the author has even bothered to open their Bible.