That's because SSPX is only passively and not strictly anti-feeneyite, whereas CMRI is strictly and vehemently anti-Feeneyite due to their belief that salvation can be had outside of the Catholic Church.

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Precisely. Just like Vatican II says, with which they objectively agree.
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CMRI has no problem with Protestants, Mormons, Buddhists, Jєωs, Hindus, or atheists (including Communists), etc., because they firmly believe that there IS salvation outside the Church. They believe it as if it were defined dogma. You see, the problem is, they don't know what definition IS when it comes to dogma.
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If the CMRI seem to be opposed to Vat.II, it's only because they pretend it's not a Council of the Church -- because John XXIII wasn't a real pope, you see. That explains EVERYTHING, you see! At least they're consistent. They accept the liturgical changes in Holy Week under Pius XII for the same reason, even though that was the opening of Pandora's box, because, "He was a valid Pope." Never mind he's the one who put Fr. Annibale Bugnini (the Freemason) into his office of destruction of Sacred Tradition, etc... Just never mind that.
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Just never mind the fact that some Freemason (Bugnini?) put into the ear of Pius XII that all these octaves on the calendar are "too confusing!" and bowing to the name of Jesus in the rubrics is "too confusing!" so, then, let's get rid of them! Just never mind that. Rip these things out of the missal so that by 1962 a "new and improved" version can come out, one that the SSPX even will be tricked into accepting. Yeah. That's the ticket!
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The CMRI don't have any doctrinal difficulty with Vat.II. (They say they do, but that's just a game in deception they like to play.)
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Frs. Dominic & Francisco Radecki CMRI, for example, have been coming out with a "new book" that's over a year late now, supposedly about Vat.II, but it's looking a lot like they had to re-write it. Gee. Wonder why? Their previous book, Tumultuous Times, is overstocked, undersold, and full of glaring problems.
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Perhaps they're having a hard time avoiding the same problems with the new book! (What a shocker!   :o  )
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CMRI was founded using cult like tactics enabling them to coerce a seemingly large number of vocations. They basically manipulated many young people attending their week long Espiritu Seminars. The attendees were told that if they even had a thought of becoming a Priest or a Nun then they had a vocation. If they didn't follow this supposed vocation, then they would damn their souls. This was all carried out with little sleep or food allowed. After their founder was kicked out, several Priests attempted to reform them to no avail. These good Priests were also kicked out or left and some were slandered. The CMRI clergy are and always will be self taught and have fabricated their own private brand of theology. Unfortunately, there are a lot of good lay people who got caught by them. Some were desperate for the Mass and Sacraments. CMRI will dangle those out there as part of the production they portray as Catholicism. They are well trained in putting on a good exterior show and front. It is really quite a tragedy for all involved. I realize that it is not entirely their fault, but it still is not good. God bless you all!

Did Bp. Pivarunas actually “excommunicate” this man, or is the OP just making this up? 

Yes.

No.

This.

Did Bp. Pivarunas actually “excommunicate” this man, or is the OP just making this up?  So I am clear, excommunication is a specific canonical term.  Was the term used?  If not, then this entire thread is misinformation.

The OP is just making it up.

That’s not pertinent to this thread.

Nothing is pertinent to this thread, because it is not a thread at all, as it contains no enlightening information, and who cares after all?