By Parisa Hafezi and John Irish DUBAI (Reuters) -France lashed out at Iran for “dictatorial practices” and taking two of its citizens hostage after a video aired on Thursday in which they appeared to confess to spying, amid weeks of unrest that Tehran has tied to foreign foes. Iran’s intelligence ministry said in May it had arrested two Europeans for allegedly fomenting “insecurity” in Iran. France has condemned their arrest and demanded the immediate release of Cecile Kohler and her partner Jacques Paris. Iran’s state media often air purported confessions by suspects in politically charged ca…