Carlo Vigano's main objection to Francis is that francis spoke in favor of 'civil unions' for gays.
that's a weird thing for a pope to even have an opinion on since its not a matter of spiritual or physical welfare…merely a status in the state.
I'd also like to point out that Vigano is objecting to Francis for holding the same opinion that POTUS holds. If vigano is right and francis' opinion is unchristian…then so is trump.