In the article you linked to, he called Mother Teresa “a fraud”. Elsewhere he accused her of “stealing millions of dollars” and being “a cult leader”. Now generally if you’re going to accuse someone in print of commiting theft and fraud, you want to be able to say when the person was convicted or at least indicted of the crime, which Hitchens couldn’t do. If not that, you at least want to be able to offer some evidence that the crime occurred, which Hitchens also couldn’t do. Indeed, in that article he offers no evidence to back up any of his serious accusations against here. There are two links within the article, but neither goes to anything.