Leviticus 24:14
“Take the blasphemer outside the camp. All those who heard him are to lay their hands on his head, and the entire assembly is to stone him.
See that's not a good idea because if you aren't free to blaspheme then you aren't free to think and express your ideas. People who aren't free to reason and speak are stifled in their creativity, so societies and individuals suffer when you stone blasphemers.
Stoning blasphemers hurts the community because without blasphemers there is no way to know what the faults of your religion are, presuming your religion has any. Most believers are fairly certain that any faults with religion are mainly in someone else's religion. So they usually are against stoning blasphemers unless they happen to blaspheme their religion.
More things your god may tell you to do that aren't good ideas on the flip...
Genesis 17:11
New International Version (NIV)
11 You are to undergo circumcision, and it will be the sign of the covenant between me and you.