The Pope is giving leadership to millions of Catholics on how to feel about Trump, that's good leadership and the right leadership and a good thing in this instance in history regardless of the churches previous record in the past.
It's not the least charm of a theory that it is refutable. The hundred-times-refuted theory of "free will" owes its persistence to this charm alone; some one is always appearing who feels himself strong enough to refute it - Friedrich Nietzsche