He also said that it should not be up to a single nation to decide how to intervene in the conflict .
Pope Francis , leader of the world 's 1.2 billion Roman Catholics , said that the international community would be justified in stopping Islamist militants in Iraq .
Pope Francis also said that it should not be up to a single nation to decide how to intervene in the conflict .
Pope Francis , leader of the world 's 1.2 billion Roman Catholics , said that the international community would be justified in stopping Islamist militants in Iraq .