The way I see it, Divine Command Theory is just an excuse immoral religious apologists have devised in order to sanction the horrible atrocities and crimes against humanity committed by their own God–because to have to face their conscience and admit they worship an evil Devil would be to destroy their very faith that they are following the path of righteousness.
For the person of Faith only faith matters. Conviction is their idol. Professions of certitude completes their Holy trinity of corruption. Even if it means God be dammed… so be it… faith will be maintained.