You can't really blame the hippos themselves. They didn't mount an invasion. They were imported. But now they have escaped and are on the loose in Colombia.
The importer is described in the article as a "drug baron". As opposed, I suppose, to a "drug czar," who in American lingo is a guy who launches war on drug barons.
"It's just like this crazy wildlife experiment that we're left with," says San Diego University ecologist Rebecca Lewison. "Gosh! I hope this goes well."
It's mentioned in the article, that hippos taste like pork.
So maybe all the Colombians should simply grab a fork.