"Not so very good public relations for Belize. Surely the government will take swift and appropriate action."
Oh yes they always do, its something you can count on...
Truthfully this is not a rare occurrence the Blue Creek area is packed with mounds and the Mennonites have cleared lots of sites for farming purposes or agate source.
In Rome its difficult to do anything with out destroying a Roman ruin. Belize has tons of sites like this, the country is just full of Mayan sites like this one, but this one is in the news and will be touted as unique and special to sensationalize the news. There have been scores of others destroyed just like this.