Here’s the link to a Patheos post by Scott Eric Alt. It’s a good read. He explains what Taylor Marshall is claiming about the Popes and the Church.
Scott Alt concludes: “For Marshall does not just attack Pope Francis; he attacks every prior pope back to and even including Pius XII. This says to Catholics that we can not trust the Church or the successors of the apostles, but that we must trust “red-pilled” social media figures to tell us the truth and interpret doctrine correctly. That’s not what Christ wanted for his Church.”
My take is more stark. By rejecting the Popes going back to Pius XII and Vatican II, and their teachings, Taylor Marshall commits schism and heresy. By casting doubt and expressing dissent so extensively, he destroys the faith more extensively than most heresies. And then he claims that has been “infiltrated all the way to the top” by Satan. This constitutes apostasy, since no reasonable person with a good conscience should adhere to religion which has be infiltrated by the devil all the way to the top. Marshall has rejected the Christian faith itself. And then, since the Church is the body of Christ, with the Holy Spirit as Her Soul, and Christ as Her Head, such a claim is blasphemy against the Holy Spirit and against Christ.
the reproach of Christ 
Mr. Taylor Marshall is now more Protestant than before but currently infiltrated into the Catholic Church. If he does not repent, he, such book (and other persons and books attacking the Papacy) and his supporters will be anathematized, if not during his lifetime, later when the Church starts purging things.
The Council of Trent considered heretics as “as satanical, these inventions devised by impious men” (Session Thirteen, Chapter One), those contrary to the dogma of the Real Presence of Christ in the Sacrament of the Eucharist. These other heresies could not be far different.
Mr. Conte, I’ve never read Mr. Marshall’s book, only what others have said about it. However, didn’t Our Lady of Akita tell Sister Agnes that “The work of the devil will infiltrate even into the Church in such a way that one will see cardinals opposing cardinals, and bishops against other bishops. The priests who venerate me will be scorned and opposed by their confreres…churches and altars sacked; the Church will be full of those who accept compromises and the demon will press many priests and consecrated souls to leave the service of the Lord.” (Taken from Wikipedia)
What are your thoughts on this?
Thank you in advance for your response.
There are always sinners in the Church, and in some leadership roles. So Mary says that “the work” of the devil infiltrates to the extent of conflict among cardinals and bishops; this is like Judas being led astray; there is always grave sin among some Church leaders. Her assertions are nothing like those of Taylor Marshall.
Marshall claims the devil has infiltrated to the extent of perverting Popes, Councils, doctrine, and discipline; choosing the most recent Pope; and thereby corrupting both the Popes and the largest part of the body of Bishops.
https://www.patheos.com/blogs/scottericalt/documentation-of-taylor-marshalls-attacks-on-pope-francis-and-prior-popes/
The two claims are very different. Marshall’s claim is blasphemy against the Holy Spirit, for the Church is the body of Christ; She teaches by the work of the Spirit; She has Christ as Her Head and the Pope is His Vicar. Also, Marshall contradicts the dogma that each Pope has the gift of truth and therefore immunity from grave error, as well as the dogma that each Pope has the gift of a never-failing faith. So Marshall’s position is heresy. It is also schism, since he puts himself above every Pope to judge whether he has been led astray supposedly by the devil and puts himself above the Magisterium, to judge whether it has taught grave error (something that is not possible).
https://catholicism.io/2019/03/26/the-roman-pontiff-immunity-from-error-and-never-failing-faith/