Who is he to know what he's talking about? (Apparently the question is who am I to know?)

No, Pope Francis.

The Bible and the Koran are not the same.

Not even close.

Nor is Allah the Holy Trinity.

ADDENDUM: On the other hand, who am I to know what I am talking about?

My Roman Catholic nephew, Steve, points out that in fact, Pope Francis never said any such thing. The quotation is false.

And to say the least, I'm glad in this case to be wrong.