Why 10 Commandments are not Changeable? Christians did violate the First and Third commandments by worshipping Jesus and statue and image of Jesus.That's because one must know how God made the man and the world, his 10 Commandments, the prophecies, how God delivered his people, those books are connected. But Christians concentrate more on Christ's teachings and follow the NT, and of course, the Ten Commandments from OT are a MUST! You can't be a decent Christian if you don't follow them
All in all whole Bible is great, both NT and OT
And the Modern law has made "Adultery" not an offense... so what is the sanctity of those 10 commandments.
And "How" God made the creations in six days (as mentioned in Bible) has become the laughing stock for every one.
So what is the value of these OT books?