Interesting conversation guys.
First I would like to explain why it is believed that the old testament laws are now defunct because this conversation has become all about the 10 commandments and as we know those aren't the only laws that were implemnted by God in the old testament.
1) Sacrifice: Jesus was the perfect lamb. The perfect sacrifice. After his death these the sacrifice of a first born lamb was no longer needed. Jesus paid the price of washing us of our sins.
2) Sabbath days: Sabbath days include all feasts such as Passover. These were days given to Isreal to observe as it was thought on these days that the people were closest to God. With the death of Jesus we can be in constant contact with God through Jesus.
3) Now for the 10 commandments. I believe it was explained a little ealier in this thread. The 10 commandments themselves WERE NOT abolished. In fact Jesus says to follow the law. BUT following them was no longer the way to heaven. Allowing Jesus into your heart and life was now the way to be saved. Jews didnt like this and still don't because they were God's favored people. But this new law allowed Gentiles to go to heaven as well. It leveled the playing field. This is the REAL reason Jesus was crucified because they no longer had power over the people. If everyone was equal what did it mean to be in charge? The became egomaniacs. They felt they were going to heaven because of who their Fathers and Grandfathers were and that their place was already sealed.
I'll close with suggesting everyone read Ephesians 2:13-22.
PS- Someone mentioned Genesis 22:9 & 10. This was a test to see if Abraham truly put God first. Even today we are to put God FIRST in our lives. This story also fortells of Jesus when Abraham tells his son that God will send his own perfect lamb.