What does Ezra 6:12 mean?

May the God who put his name in that temple bring down anyone—king or people—who tries to destroy it in Jerusalem. I, Darius, have given this order. Let it be carried out exactly as I've said. Ezra 6:12 - Modern Text Bible

(He calls down a curse on anyone who would harm the temple, making it clear his order is final and must be obeyed.)