Tradcast, Fisher More, some King thing - I had to look it up, but nothing made it clear and quick, but I got: Tradcast is Sedevacantist (and I am not); King thing was 2010, so I don't know if TM's views on whatever happened have evolved; Fisher More is the college is TM's hometown (or nearby) that he was apparently involved with, then not, because of not being happy about something with King.
But I am not motivated to find out more, because of course it's expected that Tradcast would not like Infiltration because they think every single thing since Vatican II is not real, so, there is no church itself to infiltrate. Also no surprise that they could find ways to pick it apart. Remembering that Rose's Goodbye, Good Men was not good enough as an expose\t for many. One can always find points of a thing to argue, and argue endlessly, especially if they cross our preconceived ideas. Especially ideas we are very committed to.
So, if you are Sedevacantist, the only church existing to be infiltrated would be SSPX. Oh, and we see that happened. Only, it's same same MO used on the NO church.
I was Evangelical Christian before converting, and in that path one must use discernment, without the actual Church teachings to consult, but only the Bible, and whoever seems most expert and pious to interpret. I was interested always in becoming "more Christian", and cult-like groups often claimed to be that, and they looked more Christian. But looking closer, I saw patterns of things not right. So when I became Catholic and saw so much wrong in our NO Church, I looked a bit at SSPX, and saw some of those same marks - more Christian, convinced they were the only right ones, i.e. But also what concerned me was the unquestioning loyalty to a hierarchy that has no transparency. I know that is not a good thing, that it is a breeding ground for abuse of power, in all manners. Look what it invites and harbors. : ( I am sorry for all those who are suffering because of the truth of the CM revelations, and I am aghast at those in denial, claiming CM is just out to get SSPX. How silly. But sad.
Not commenting on the thread topic per say (SSPX), just Taylor Marshall. To me he is a phony subversive guy. Not to be taken seriously let alone trusted. Tradcast did not refer to sedvacantism in it's review, just that TM's book was poorly written without the due diligence research the topic called for. TM is an ace manipulator (remember his role in the destruction of Pachymama? He had to let us know it was an arranged event and his idea...along with his Coronavirus hero that tossed the idol. It all sounds contrived to me. I don't trust him, sorry.
PS, I an not a sede but actually listen and read many different positions in order to form my own. In fact you should listen to Fr Jenkin's very balanced assessment of the CM SSPX issue in the video above.