i oppose the idea of 'papal infallibility.' there is only infallibility in scripture.
as for francis calling Annoying Orange out as a non-christian for his desire to build a wall: he essentially condemned another human for their sins(or more specifically, a sin not yet committed), which is forbidden.
on gay marriage, the bible says a man shall not lay with another man, which suggests only gay love is forbidden, but traditional christian marriages require consummation(love) to create a special soul tie between the wife and husband. that said, with the new testament in your mind, you should embrace all love between humans, and in my opinion legal marriages with no tie to religion should be allowed.
as far as contraceptives go, as long as you're married the way i see it you can have all the protected love you want. i believe the act of consensual love alone between a man and women married to each other glorifies God.
these three topics aside, francis has made many advances against God. I have suspicion that he may even be the false prophet spoken of in the Bible, and i've heard others go as far to say that the catholic church has always been the church of satan. not entirely unbelievable, as from what i can tell they basically deny Christ's sacrifice as sufficient enough to 'earn' their spot in Heaven.