[Dominick]

The SSPX never left the Catholic Church; it's the majority of Rome that has "wandered off the reservation".

The Pope did not leave the Church. The Pope is the head of the Church, and he declared the SSPX is not in the Church. He binds those on Earth.

[Land of the Irish]

The Pope did not leave the Church.

Oh, even he wanders off the reservation, every now and then.

[ultima ratio]

"The Pope did not leave the Church. The Pope is the head of the Church, and he declared the SSPX is not in the Church. He binds those on Earth."

The Pope was in error. He contradicted his own papal law which granted the Archbishop and the newly consecrated bishops all the canonical coverage they needed to consecrate in a time of necessity. The Pope mistakenly--or willfully--ignored his own canons. He owes the SSPX one of his famous apologies.