I have done some reading and research in this after reading this thread, though I haven't got Hitchen's book.
I found a particular quote disturbing. (that there were a number of citations for it and I found it in a speech that she gave at the National Prayer Breakfast in 1994. The whole speech in on the EWTN site)
"One day I met a lady who was dying of cancer in a most terrible condition. And I told her, I say, "You know, this terrible pain is only the kiss of Jesus--a sign that you have come so close to Jesus on the cross that he can kiss you." And she joined her hands together and said, "Mother Teresa, please tell Jesus to stop kissing me.""http://www.ewtn.com/New_library/breakfast.htm
The idea that Our Lord is giving excruciating pain to someone and that it is a "kiss" which is a token of love is one that I find alarming, to say the least. And for someone who is not in pain to say such a thing, which I will admit gave me the impression that the patient was being told to just accept it and not get any relief, seems lacking in empathy at the least.
This kind of idea could lead to some people thinking that God is some kind of "cosmic sadist" who gives pain and calls it love.
I'm sorry that I"m not very articulate here, but I am, as I wrote, disturbed by this.