The way the comment is written it appears to be attacking Puerto Rico and claiming that it is better suited to be called a "colony". If the poster was unaware, this word has a very negative connotation due to what has happened to many of the places the United States and England have colonized. eg Haiti, India, "Just open a history textbook"

If the poster was instead trying to use this bad connotation to assist the argument that Puerto Rico probably shouldn't be a territory (which I now assume after looking at your comment), then that argument was lost in what was written. The writing is unclear in its intent, and that is likely why some folks misunderstood it. It kinda assumes you get lucky and interpret what he's saying the right way.