The Pope just gave a visiting delegation of North African bishops a long lecture on how they had to “promote dialogue with Islam” and “not proselytize” for Christianity. (To my knowledge, none of them are doing that anyway, alas.) In any case, he also told them to learn Arabic and become familiar with the Koran.
So I think when ISIS arrives in Rome, they’ll find that they really didn’t have to bother.
It would be helpful for all of us if you could post a link. Thanks!