I don’t see how that’s an option. I’m friends with someone who hasn’t gone so far as to denounce and reject the Holy Father’s authority but who has expressed a very low opinion of him. And, related or not, this guy also has definite SSPX sympathies. A lot of radtrad tendencies. I can’t turn my back on someone who may well need an orthodox Catholic influence in his life.
There’s a big picture going on here and I’d give anything for the radtrads to recognize that. Rejecting them only drives the wedge deeper. That can’t possibly be the right approach.
There was probably a time centuries ago when reuniting with the Orthodox would’ve been relatively easy. Easier than it is now. The Orthodox Church is now entrenched; reuniting at this point may well require a miracle.
No matter how loyal to the Pope the SSPX of today might be, the day may come when they reject papal authority altogether. In effect they could become a totally separate communion like the Orthodox. And if that happens, they’ll be in the same basic place as the Orthodox in terms of the challenge of reunification. It may even be impossible.
So, with respect, no, I don’t think deleting radtrads and SSPX-sympathizers is the right approach. There needs to be some give and take. Inflexibility will lead to alienation, and very possibly lost souls.