Indeed it is beautiful, yet the discussion is not about the beauty of the quote but its truth that heretics are not part of the Church. They are outside of it. A truth which you obstinate deny.

Denzinger, Sources of Catholic Dogma, 13th ed., no. 423, pg. 167
https://u1lib.org/book/14465091/e4a377

Heretics are not Catholics until they abjure their errors. As three other people have told you. Get behind me Satan

  Correction:  Formal heretics.  Even MHFM admits there are different types of heresy.

I never denied that heretics can convert and return to the Church. Not once. Admission of the sacraments being only accessible to Catholics doesn't contradict that either, as to abjure the error is to re-enter the fold as a dead member.

Antipope Francis, for example, has never done such and he remains outside the Church, therefore, he has no right to command in the Church nor can he be the Pope. Further, he was a manifest FORMAL heretic before his "election", so either way its impossible that he is the true Pope. The same goes for his predecessors after Pius XII.

They act as the canon lawyer, judge and jury...all the while, being simple laymen.  It's ridiculous and beyond anything in church history.

Church History examples:
1.  Martin Luther (one of the most famous and public heretics in all of history), even after nailing his 100 thesis to the door of a church, was not excommunicated until a OVER A YEAR later, after multiple talks, hearings, etc.  Does this matter to some in our day?  No.  They can throw out any and all persons they deem necessary.  No matter that they are simple laymen, monks, or priests, with no jurisdiction, no canon law training, and not one iota of ecclesiastical authority.

2.  Those who correctly point out that Fr Feeney's excommunication was faulty (and therefore probably null), in that he requested a public hearing with rome officials (as is his right under canon law) but was ignored.  Yet these same people don't blink an eye when it comes to deciding that this or that priest, bishop or pope is no longer in office, ignoring all pretenses of a trial, or canon laws, or any kind of procedure whatsoever.

It's shocking in its lack of common sense.  It's a (sad) triumph of theory over reality, where "imaginary righteousness" takes precedent over the laws of justice.

“… for men are not bound, or able to read hearts; but when they see that someone is a heretic by his external works, they judge him to be a heretic pure and simple, and condemn him as a heretic.”

Canon 2200 § 2. Positing an external violation of the law, dolus [i.e. malice] in the external forum is presumed until the contrary is proven.

Canon 2340 § 1. If anyone from an obdurate spirit stays for a year under the censure of excommunication, he is suspected of heresy.

§ 2. If a cleric stays for six months under the censure of suspension, he shall be gravely warned; and if, a month from the warning having passed, he has not withdrawn from contumacy, he shall be deprived of benefices and offices that he might have had in the Church.

1.  Martin Luther (one of the most famous and public heretics in all of history), even after nailing his 100 thesis to the door of a church, was not excommunicated until a OVER A YEAR later, after multiple talks, hearings, etc. 

It would, if it we were talking about a valid Pope falling into heresy and then losing office. The problem I see is that these Antipopes were never valid material to begin with, being manifest heretics prior to "election", and therefore have no office to speak of. Essentially the whole "impounded Pope-elect" idea I've seen some sedeprivs propose, specifically for Roncalli, Montini, Luciani, and Wojtyla, being valid bishops elected by true Cardinals; albeit, again, without office because of their manifest heresy. Ratzinger and Bergoglio, being that one is a valid priest but not bishop, and the latter is neither; cannot, from what I infer here, be proposed to even be Pope-elects.

So, perhaps the sedeprivationist thesis may have been possible for a time, say, up until JPII died. But after that point, you find yourself simply with a sede vacante.