To me, it almost sounds as if the OP is conflating SSPX with real schismatics and radicals like SSPV.
I first became acquainted with SSPX decades ago. My father was very uncomfortable with some of the excesses of the post-Vatican II Church, and rightly so, in my mind. He accepted the vernacular, not happily, but willingly. He wasn’t keen on turning the altars around, but he accepted it. He was less than impressed with the guitars and the ersatz folk singing and the burlap banners, but he lived with it. He was dismayed when orders of sisters “found new ministries” and left schools and hospitals in the lurch.
He had some friends who went SSPX; some very good people. My father was sorely tempted to join them, but didn’t because his reverence for the Pope and his authority, he felt, was not something he was free to depart from, even the slight degree to which the SSPX did, or seemed to.
I know a good number of SSPX people, and I find them to be kindly, earnest people, not crazies at all. One of my wife’s best friends is SSPX. Yes, the lady invites my wife to the SSPX Mass, but she isn’t strident about it or pushy or argumentive. She and my wife share many, many beliefs about morality and spirituality and prayer and humility.
And well they should share them because the SSPX lady was taught from exactly the same catechism as my wife was, believe 100% in Catholic doctrine, believe in the Eucharist and all the other sacraments, and revere the Pope as the Vicar of Christ on earth.
What the SSPX do NOT accept are relativistic mores, loose liturgical practices, dissident theologies, and politicized religion. My wife, and many a non-SSPX Catholic is the very same in that way.
Now, do I think SSPX folks are sometimes more insular than they ought to be? Yes. Do I think they are a bit narrow in their insistence on the Tridentine Mass? Yes, I do.
But then, the Tridentine Mass is, after all, just the Mass. It’s valid. The Popes have never said it isn’t, but have affirmed that it is. It’s not so hard, therefore, for me to accept a certain narrowness on the part of SSPX folks in certain ways. After all, they are, in my experience, far less narrow than some of the priests in the “regular” Church, who find a way to endorse totalitarian hard left views and never give any moral guidance beyond liberal political talking points.
I would like to see the SSPX get their own personal prelature like Opus Dei has. Their main thing is not to be under the dominion of local bishops. I can understand that. Would I have been comfortable under Abp Weakland? Would I have been comfortable if Cdl Mahoney told me to celebrate a 'rainbow Mass"?
Our previous bishop declared that he would never allow a TLM in the diocese, and he kept his word on that. People who had some measure of devotion to it had to go outside the diocese or attend a clandestine TLM one priest sometimes said. Or they had to go to SSPX, and some did.
So was that bishop right? I don’t think so. The first thing our new bishop did was set up some parishes in the diocese where the TLM would be said. They sky didn’t fall. There was no fascist takeover. No “rad-trad” firing squad emerged. Those folks (who are not SSPX) are quiet, kindly, unassuming people. I have been to those Masses some. I certainly do admire their choir…a lot. They actually sing polyphonic hymns as well as some Gregorian chant. It’s beautiful. The altar servers are precise and methodical and reverent (and boys). People know their Latin, or at least can read it. That congregation knows the Confiteor, the Our Father and the Credo in Latin by heart, and many of the responses.
I don’t know. It’s not so bad. In fact, it’s just a smidgen like visiting heaven for an hour.
Don’t misunderstand. In one of my two parishes, the convert daughter of a Baptist preacher plays the hammer dulcimer during Mass, and I love that too. And I love the old, mostly protestant, hymns I heard over and over again on the radio or the Ozark Jubilee when I was a kid, and sang in the strawberry patches with the Baptists. (I’ll admit, Marty Haugen, Carey Landry and the St. Louis Jesuits leave me cold)
I think that to know most SSPXers is to like them, even if one has some different thoughts from theirs.