JP II declared SSPX adherents to be in schism and their leaders excommunicated in Ecclesia Dei. As Joseph Cardinal Ratzinger (then running the Holy Office), Benedict XVI signed off on the excommunications as did Bernardin Cardinal Gantin of Dahomey, head of the Congregation for Bishops. Has B-XVI formally withdrawn the excommunications and the declaration of schism??? If you claim that B-XVI himself has done so, please document the claim. Castrillon de Hoyos and his subordinate bureaucrats are not popes and lacked the authority to whitewash SSPX. As head of the Holy Office, B-XVI “had discussions” with his onetime professor Hans Kung but not to Kung’s relief. Quite the contrary.
The Holy Father hasn't lifted the excomms?
Keep taking those fatso pills you're on. Separation from reality does have its bennies.
Has B-XVI formally withdrawn the excommunications and the declaration of schism???
Well, not that it is entirely the point, but I do believe that the excommunications have in fact been lifted, leading to a great controversy regarding the aforementioned Williamson. And, you may reject the opinions of the Cardinal placed in authority by the Holy Father himself, but it would not change the matter. The Pope commissioned Ecclesia Dei with its authority and when it acted it did so in his name, unless he openly countermanded it. He never did this regarding the state of the SSPX, and considering this suggesting that the opinions of the Cardinal in question can be denied by lay people in the pews sounds a bit like what those in the SSPX are themselves arguing.
And, all of this aside, the SSPX are still obviously Catholic. Their wounded relationship with Rome has not made them otherwise, or severed their responsibilities as priests and bishops to obey Rome. They are Catholics still, if bad ones. If they are not Catholic then they would not be bound in any way to answer to the Holy See, as everyone demands they do, which is itself evidence that people know that they are still in fact Catholic.