It is very, very wrong to call SSPX “defenders of Catholic tradition,” because they reject Vatican II. They are not allowed to do this, because it is a valid ecumenical council, despite what they say to the contrary.
Of course there have been abuses with the mass. But this does not render the mass invalid. The fact of the matter is, they are no different from Protestants–they insist on interpreting doctrine according to their own personal views, rather than humbly submitting to the Vicar of Christ. You can’t have it both ways.
They will claim, “oh, it’s only discipline, not Church doctrine, that we’re opposing.” Nice try, but if you actually read Vatican I (which SSPX claims to uphold), it specifically says that the Roman Pontiff has full and supreme authority in matters of Church DISCIPLINE as well as in matters of Faith and Morals. Therefore, they can’t rely on the argument, “oh, Vatican II didn’t define anything, so we don’t have to obey it.” That is simply not true. Read Vatican I, and you will clearly see it.
It does not matter how reverent their masses may be, because they have severed themselves off from Christ’s Bride, His One True Church, despite what they may claim to the contrary. They have said horrendous, horrendous things about every Pope from Blessed John XXIII (yes, I am proud to call the man who stared Vatican II “blessed”) to Benedict XVI.
They are just like Protestants, except whereas Protestants interpret Sacred Scripture according to their own personal preferences, SSPX interprets Sacred Tradition according to their own personal preferences. They are puffed up with pride and refuse to humble themselves and submit to the authority of the Vicar of Christ, the Roman Pontiff.
I pray for reconciliation. But no such reconciliation will come about until they recognize that Vatican II was valid, and that they owe it, AND the Pope, their alliegance.
And finally, I should point out that I absolutely love the Tridentine Mass, but unlike supposed “traditionalists” who separate themselves from the Church, I recognize that any beauty that that mass may offer is for nought if those who celebrate it are not in union with the Pope. You cannot go to an SSPX mass and remain in good standing with the Church.