Nonsense!!!! They are not the same god. This man is an abject fool, clown, buffoon and Antichrist.
Is an even headed response even possible here?
First and foremost: Francis is a sinner, as is every member of humanity except the Jesus who as God became man, to bear the sin of the rest who were willing to let Him do it.
Francis has committed some egregious errors. The Allah of Islam is an illusory front for evil spirits which makes Islam almost sui generis in its evil. Oriental faiths may carry an attenuated trace of the Abrahamic God along with their false or distorted deities. They seem to want some kind of ultimately good supreme principle, even in the sense that we know good. However along with his errors — so has the Magisterium of the Roman Catholic Church (here come the arrows! Duck! Crazy Evangelical Alert!)
I think he could get right on Islam with more observation of world events. When they refuse enough to return his love, he could learn. The repudiation could look quite Davidic when it happens.
In general: fasten your spiritual seat belts (and just belts, i.e. the belt of truth) snugly. A lot is poised to happen.