AMSTERDAM - The Dutch army has been operating as part of NATO in a remote and unruly part of Afghanistan since 2006. Fighting against the Taliban has been heavy at times. Twenty-one Dutch lives have been lost, out of about 1,800 men and women. The Dutch were supposed to have been relieved by troops from a NATO partner in 2008. No one volunteered. So their mission was extended for another two years. But now the Social Democrats in the Dutch coalition government have declared that enough is enough. The Dutch troops will have to come home. Since the Christian Democrats do not agree, the government has fallen.