There are other Latin bishops receiving "blessings" from ministers of other ecclesial communities (even female "ministers")
so why shouldn't Pope Francis be photographed doing the same as well? If we are scandalized, it's our fault, right?
Eugene Girin on the Holy Father's visit to the Holy Land: Taking Ecumenism Too Far (although the meeting with the rabbis isn't really an example of ecumenism but of interfaith relations)