Can you answer the question though?
Is the Old Testament literally true for the modern world? Yes or No?
Is anyone solid enough in their faith to answer a very simple question?
As I stated, What problems exist in our society today that would not if we adhered to its teachings? the answer is many, so the OT teaching IS applicable - YES - it's just we WILL NOT and thus we reap the consequence.
The entire Bible is true.
Should we stone adulterers today? No, they were under the Law, we are under Grace ever since Jesus rose from the dead, provided we trust in Him.
I get the impression you are not trying to understand the issue, but only argue against it.
"Is anyone solid enough in their faith to answer a very simple question?"
Are you solid enough in your doubts to die without fear?