Because it is an extreme case: small population, almost no diversity, and on an isolated island. There aren't many internet connections to Greenland and there i

Because it is an extreme case: small population, almost no diversity, and on an isolated island. There aren't many internet connections to Greenland and there isn't much demand for different ISPs either. So cutting a cable or an ISP off of the Internet cuts off the whole country (it's an autonomous country). So, a mad despot or a sloppy construction worker could cut Greenland off of the internet. Another interesting case mentioned in the Article is The Netherlands: a small country, a small population, but a enormous amount of ISPs and connections to other countries. Good luck cutting that off as a whole, you mad despot!