Six days ago, it was announced that 100 Catholic clergy and scholars have signed a petition that calls Pope Francis to repentance for facilitating the pachamama worship in various Churches in Rome. The list of signatories is growing.
Could that be a reason why the pope has compared conservatives to nazis? This happened at a meeting of the International Association of Penal Law. He laid into capitalism (but said nothing of socialism, if you'll notice), "ecological sins", the death penalty and so on. By the way - for an excellent treatment of capital punishment, see what the late Fr John Hardon had to say on the matter.
Speaking of "ecological sins", he is contemplating the addition of those faux-sins to the catechism. He calls them "sins against our common home". As several theologians have pointed out, one can sin only against God and those created in His image and likeness. This isn't just sloppy theology, I suspect he is engaging in erroneous personification of the planet, and perhaps seguing into deification of the same. Additionally, no one can simply proclaim the existence of a new set of "sins". Either a given action was always a sin or it isn't now. The earth was given to us by God for our usage, and we must be careful stewards of the earth, both to honor God and to preserve it for the use of other persons. The earth, as an impersonal entity, has no inherent claim on the solicitude of man for its own sake.
Perhaps the statement of that previous paragraph (and others uttered by many faithful Catholics) is why the pope is now railing against us. He is trying to cow us into silence. We cannot let that happen.