Catholic Dogma (Deny This and You Are Not Catholic) "Furthermore we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff …More
Catholic Dogma (Deny This and You Are Not Catholic)
"Furthermore we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff." Pope Boniface VIII
Unam Sanctam - Papal Encyclicals
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"It is a fatal error to hold that a heretic is a valid pope and that those who separate from a heretic leave the Church and are schismatics."
Archbishop Carlo Maria Viganò has the right to express a personal judgement, which is his right to conscience.
Although A TRUE POPE CANNOT fall under the jurisdiction of the Church (or even a future or past pope - as an equal cannot judge an equal), A DUBIOUS …More
"It is a fatal error to hold that a heretic is a valid pope and that those who separate from a heretic leave the Church and are schismatics."

Archbishop Carlo Maria Viganò has the right to express a personal judgement, which is his right to conscience.
Although A TRUE POPE CANNOT fall under the jurisdiction of the Church (or even a future or past pope - as an equal cannot judge an equal), A DUBIOUS POPE CAN fall under its jurisdiction. According to the Church's teaching and canonical tradition, AN HERETICAL OCCUPANT OF THE PAPAL THRONE CAN BE JUDGED by the Church. A heretic is an incapable subject of the papacy, for which reasons the canonical tradition of the Church rules that A HERETIC IS NOT A VALID POPE.
A heretic can't be a true pope. IT IS A FATAL ERROR TO SAY THAT A HERETIC IS A VALID POPE AND THAT THOSE WHO SEPARATE FROM A HERETIC LEAVE THE CHURCH AND ARE SCHISMATICS. But the heretic is an anti-pope who defects from the Church. Those who separate from him remain in the Church. But those who remain under the heretic follow him out of the Church into schism.

It is not Vigano's private opinion but is an evident and undeniable fact that the Bergoglian magisterium officially teaches heresy against the Catholic faith.