Mr McTiernan's attorney Oliver Diaz said in a statement that the movie director was a victim of "prosecutorial vindictiveness" and planned to appeal against his conviction.
Before the appeal against release was announced, Mr Loach said such a move by the Swedish authorities would "show there is some vindictiveness that goes beyond this particular case".
Forbes first published his American business and financial magazine in 1917, the vindictiveness of Versailles and an increasingly adversarial approach to trade contributed to even greater carnage come World War II.