Remember it's not enough to just spread your cheeks and wipe the resultant effluvia on the screen.
I really don't know on what basis a Theist (Francis) and an Atheist (the Dala Lama).. could have a discussion. There would be no common first principles from which to proceed. They'd just be talking around each other, rather than to each other.. with no shared reference points. Kind of a waste of time for both.
I know he's a Buddhist.. you don't know much about Buddhism do you.