Total fail of logic, they know full well the UN makeup and agendas, have seen the corruption as “observers” and fully aware of the antisemitism rife throughout the organization.
What you presented is the equivalent of “I knew he would murder that person, but I only watched,” therefor I am not accountable.
The Catholic leadership literally through their support to the UN, ergo they support the UN methods and positions.
No, this is THE logic. Vatican didn’t want to get involved (can’t blame them, if somebody tried to drag me into that mess I’d wonder why they hate me so much) but didn’t want to say “we want nothing to do with this”, so they said “we’ll work through the UN”, knowing full well they aren’t in the UN. Now their hands are washed and they’re not involved.