I certainly needn't believe, and in fact to NOT believe that papal diplomacy is infallible, and at some points in history it has been disastrous. However I think that John Paul II, Benedict and Francis are reading from the same page and have the same intent: to work for the kind of social change in Cuba that will lead to greater respect for human rights and that will secure for the Church the liberty she needs to carry out her mission.
Whether it works out this way, of course, we will not see until a couple more spins of the wheel. I myself am reserving judgment until I know better what faithful Catholics in Cuba have to say about it. However I think it is over-the-top to call it "satanic relations with Castro."
Maybe people have short memories and are supercritical. I am mystified.