Who can take seriously anything that the UN says? Who?

Look at this:  "ISIS 'Almost Certainly' Committed War Crimes In Iraq: UN".  It took the UN one day to decide that ISIS in Iraq committed war crimes. One day.  After three years of war in Syria, the UN can't decide if Syrian rebels committed war crimes, or it sometimes say that "they may have committed war crimes but their war crimes are cute and pale in comparison with those of the government."