Did Jesus Abolish Old Testament Law?
Jesus abolishing the old testament law is one of those big debate points that Atheists split on. It really depends on your interpretation of the scripture but it also depends on which part of the Bible that you read.
On the one hand, you have the law being superseded by Jesus' sacrifice. We see this in Luke, Ephesians, and Romans just to name a few. Even if you just take what Jesus said, it is very confusing. At one point Jesus says that his sacrifice erases the old law but then in another book, he says that not a bit of the law will be erased.
For Atheists, it's easy to see how this confusion in doctrine came to be. With many authors writing about a made-up person, there are bound to be a lot of different points where they differ. This is also indicated by the fact there were two separate groups of Christians in the early first century. There were the Jewish Christians that still wanted to keep to the old laws, then there was the newer pagan type of Christians.
Regardless, though, most Christians tend to break the old testament laws down into 3 categories: Civil Law, Moral Law, and Ceremonial Law.