When should orders be refused?

Hindsight is 20-20. Speaking at a conference Tuesday in Efrat on refusing immoral orders, Rabbi Yuval Cherlow of the Petach Tikvah Hesder Yeshiva said that if he had known at the time that five years later that expellees from Gush Katif would still be living in temporary homes, he would have called for soldiers to refuse to participate in the disengagement.Participating the conference were, among