We know there are precedencies in the past when a defender of the faith was unjustly declared excommunicated - eg. Saint Athanasius, Archbishop Lefebvre, Saint Mary Mackillop. And they were unjust charges because the person in question was either misjudged or was forced to disobey an unjust directive against the faith. Now Archbishop Vigano has made a public declaration against the legitimacy of Pope Francis as Pope. This is a direct attack on the Principle of Authority in Religion which lies at the very core of our Catholic belief. This principle is what guarantees the truthfulness of our Churches teaching down through the ages. If as Canon 751 tells us, the crime of schism is the withdrawal of submission to the Supreme Pontiff or from communion with the members of the Church subject to him, then, as according to Canon Law 1364.1, a schismatic incurs a latae sententiae excommunication. It's that clear.

Without the principle of authority, we are no better than protestants who view every perceived injustice through the lens of their own private judgment; we deny the reality and sufficiency of the authority principle which Christ Himself instituted - Upon this Rock I will build my Church and the gates of hell will not prevail against it - in favor of trusting our own judgment and acting outside of our station. Moreover we set a precedent - and therefore a public scandal - for subjects to declare judgment on their superiors. The Church is a hierarchy governed by Divine Laws. So Sedevacantists - take your socialism back to the hell hole from whence it arose.