We are creatures and need God's grace, which is given to us through Mass and the Sacraments. If you've read any of my posts, you should know how I feel about home-alone-ism (I'm a fierce opponent of that).
I have not assimilated Fr. Pfeiffer's very sectarian "red light" (avoid every SSPX chapel, even if you have no other options) position, and I'm hardly the only one. That is the sane Catholic position.
One has to look at the fundamentals of an organization or position -- not just one or two bad specimens.
On the other hand, it would be a mistake to ignore the very real problems altogether. It doesn't matter who the pope is, or what that pope thinks of Tradition. Today, there is a sizeable faction within the SSPX (NOT just Bishop Fellay, unfortunately) that think the time is right to do a deal with Rome as they are today: totally unconverted. They think that if they could just get "inside", they could convert Rome (nevermind that several other organizations have tried this and utterly failed.)
This optimism is based on the belief that the SSPX is special not because it stands for the truth without compromise, but because it's the SSPX. It's a hubris born of pride.
The idea that the SSPX should make a "practical deal with Modernist Rome" is fraught with errors and misconceptions. Just for starters, most who hold this position no longer believe in the centuries-long conspiracy of the Jєωs/Freemasons/Illuminati against the Church, including its infiltration with Modernism. Instead, they think that the Romans are just "misguided", like the typical Indult supporter.
This is wrong, and must be opposed. That basically = "Resistance". That is to say: the old SSPX position, not changing any doctrine, not going Sedevacantist, simply rejecting this siren song of Modernist Rome and continuing the mission of Archbishop Lefebvre. And especially, they are heeding the Archbishop's warnings in the last few years of his life about a practical accord with Rome!
How the Resistance has taken shape, who is involved, its numbers, its human prospects, etc. are all beside the point! Either the Resistance, or a new group just like it, will have to succeed. Didn't Our Lord say that the Church would last until the end of the world? The Conciliar Church might have the buildings, but they have a completely different faith, infused with Freemasonic ideas, Feminism, Modernism, Communism, and other errors. So they certainly aren't carrying the torch. The SSPX is steering straight for the rocks in trying to court them. Long term, they will totally lose it.
You personally might be able to attend Mass there a while longer, but they have no future now. Eventually all their assets (money, buildings, etc.) will be in the hands of the Conciliar Church, or an organization which resembles today's FSSP. I don't oppose the individual priests (again, this is not a feud; it's a matter of principles and keeping the Faith) but I do oppose the organization, which no longer represents Tradition. They are becoming all "smells and bells". They don't talk about the Freemasonic infiltration of the Church, etc. You can read on CathInfo all the fine details of the SSPX Crisis. However, the existence of such a Crisis should be apparent to anyone with his eyes open.
So unless you plan on being dead by then (2-5 years from now), I'd suggest planning what you will do at that point. It would be smart to have a chapel (and group of Catholics to support it) already going which is independent of the SSPX. Hence why we support the "Resistance" as much as possible today. They are worthy of support.
There are dozens of good Catholics at my local SSPX chapel. Right now, most of them totally ignore the independent chapel that has been set up 40 minutes away with weekly Mass. They can more or less get away with doing that today -- but like I said, in a number of years, the SSPX will transform into the FSSP and/or be totally shut down at the whim of the latest Modernist pope. And then what? Assuming they haven't been brainwashed over the months and years (see: boiling frog in a pot analogy), they can all come here, and I'll welcome them in. Lucky for them, I managed through great effort to find other supporters. But not every locale will be that lucky!
You certainly don't want to casually dismiss the decisive actions of many different priests around the world. The priest supporters of the Resistance are extremely varied, from "a few blemishes on the ol' reputation" all the way up to "cream of the crop". It's hard to dismiss all of them as being mistaken. They're not ALL cholerics, hot tempered, etc. The entire Dominicans of Avrille went with the Resistance. They're no dummies. They alone should cause us to stop, pause, and consider what's going on.
I should probably get back to my duties of state now. I hope this helps --
God bless,
Matthew