There is of course a grey area here.  The difficulty is that the heresies that are flourishing today were apparently promulgated by the very rule of Faith that we must adhere to.  Now pertinacity is a willful rebellion against the rule of Faith.  So we have a unique situation here and I would agree that you can't accuse every single bishop in 1966 of the sin of heresy simply for assenting to Vatican 2.  

OK, so now you're actually agreeing with my original point ... after disagreeing with it just because you don't like me.  If what you just posted is true, then the mere acceptance of Vatican II does not suffice to convict Cardinal Siri of heresy.  At no point was anything quoted from Cardinal Siri to suggest that he even held any heretical propositions, much less pertinaciously adhered to them.

In fact, Cardinal Siri famously called Vatican II the "greatest mistake in history."  So that doesn't sound like he's adhering to any of its errors.

So, again, material heresy is not at all unlikely in the Novus Ordo.  I know many Novus Ordo Catholics who still profess the Catholic faith and hold out the Catholic Magisterium as their rule of faith, but they may be in material error regarding some points ... but only because they THINK it is taught by the Church.  You see, that is the definition of formal (vs. material) heresy, rejecting, even implicitly, the Catholic Magisterium as the rule of faith.  It's only tangentially related to "sincerity".  So, for instance, a Lutheran does NOT hold the correct rule of faith.  He may be sincere, and therefore God will not punish him for that particular sin (as St. Thomas teaches), but faith can be lacking by mere absence.  Now, implicit formal heresy happens when someone rejects a dogmatic teaching of the Church even while knowing that it is in fact the Church's teaching,

Besides that, if you hold that Lutherans can be saved and be within the Church, then you yourself adhere to Vatican II ecclesiology, since you now hold a conception of the Church that includes not only Catholics ... but Lutherns and other heretics and even infidels.  That is precisely the V2 ecclesiology in a nutshell.

You are insisting that the interviewer and interviewee were speaking as fact when it was not so. It was just an idea that was floated for speculation. You are using this  false premise just to bolster your point. That is dishonest

You are insisting that the interviewer and interviewee were speaking as fact when it was not so. It was just an idea that was floated for speculation. You are using this  false premise just to bolster your point. That is dishonest
 

I blatantly said they were suggesting.  Where did you come up with insist?  

You are insisting that the interviewer and interviewee were speaking as fact when it was not so. It was just an idea that was floated for speculation. You are using this  false premise just to bolster your point. That is dishonest

Here was the quote from the article:

That is, her idea was that Siri could very well have had an apparition telling him “to go along with” what the Communistic Masonic Jєωs wanted him to go along with.

Can you please explain where I insisted that the interviewer and interviewee were speaking as fact?

The main reasons I wrote the article were the heretical statement in the article that implied God could inspire evil and that many believe that Siri was pope until he died in 1989.  Other people can invent motives for me but they are nothing more than gossiping mongers.  'Til this day I have not seen a site that purports to be Catholic with so much vitriol and venom and incredible ignorance on it.  Admittedly by only a hand full of people who should not be able to participate on a Catholic site.  The part about Siri being a heretic, which he was, was an after thought that flowed into the writing.  We have plenty of R & R "Popes" who offer the NO why must we insist Siri was another one. 

Can an objective good-willed person who doesn't hate me and seek to undermine me at every turn because I repeatedly made him look like the fool he is on the EENS issue enlighten my about this site that means not Ladislaus:

https://www.betrayedcatholics.com/articles/a-catholics-course-of-study/traditionalist-heresies-and-errors/errors-in-matters-of-faith-and-morals/why-guiseppe-siri-was-never-pope/

You really wasted 5 priests' time on this?

Just sounds like you have an ax to grind against this individual.  Plus, you are attempting to conflate this particular speculation with the Siri thesis as a whole.