Guidestones were built around 1980. Turner didn’t go Left until around 10 years later.
The monument was probably older money, like Rockefellers or children/grandchildren of John MacArthur.
I would like to know the explosives used.
'Commandment' 2, "Guide reproduction wisely — improving fitness and diversity" smacks of eugenics, and Rockefeller was a well known supporter and funder of the eugenics movement...
The really big money has bigger things to do.