Of the 21 jurisdictions included on a "blacklist" of financial centers that the Dutch government said last week it considers to be low-tax potential tax havens, few have reacted with as much fury and indignance as the Cayman Islands – at least to judge by the comments that have been posted over the last few days on its news media outlets and social media.

The eight-year-long effort by organizations representing American expats around the world to convince the U.S. government to abolish FATCA appears likely to soon find itself in the middle of another battlefield.