2) Obviously. A SSPX priest is valid, the tridentine mass is valid.
The protestant service even if it is conducted by the Archbishop of
Cantebury is not valid haha. A SSPX member is still catholic.
An example. Take the case of a man who has left the priesthood.
He goes ahead and says Mass. The Mass is valid too, because the
Church teaches that once Holy Orders is conferred on someone, it
cannot be removed. But, it is illegal (to use the Church's term,
illicit), because you're not supposed to exercise the sacraments
once you have left the priesthood and returned to the clerical
state.
So, to say the SSPX priest is "valid" is telling half the story. It
is correct that SSPX priests are validly ordained. But they are
suspended from saying Mass.
However, we Catholics have to obey Church law - Jesus Christ said
so himself. He told the Apostles that, "he who hears you hears Me".
SSPX priests, according to church law, are suspended from saying
Mass, because they have been (1) illicitly ordained (2) they are
not part of a proper religious order or diocese of the church. The
SSPX has never obtained status as a proper religious order in the
Church.
One of the sins that the church teaches is to assist in the sins of
others, eg, if you see someone stealing and you help him do so -
you are guilty of assisting in the sin. In the same way, since we
know the SSPX priests are suspended, Catholics in good standing
have no business assisting in the SSPX priests' disobedience. For
example, we must not receive Holy Communion at an SSPX Mass.
There are many more examples of the intransigence of the SSPX. It
would take a few days to describe them all. The SSPX uses
"loopholes" in Canon Law to explain and justify their actions. But
no matter how hard they try, they cannot explain away the fact that
they are in a spirit of disobedience. They try to justify it by
saying, "the supreme law is the salvation of souls", or "the Church
is in a state of crisis/emergency".
However, to save your soul means to be in union with God. To be in
union with God means to be in union with His Visible Church, to
lead a life of virtue, love and charity, and not engage in polemics
with the rest of your fellow Christian brethren. There has never
been a time when the Church did not experience problems. A cursory
reading of Church history will confirm this. The example of the
saints is that they *did not* abandon the Church, and were prime
examples of obedience to the lawful successors of the Apostles, as
they worked towards reform of the Church.
Always pray for your priests and those who are serving you in
Church, and hope in God and the Holy Spirit that He will lead us
out of these difficult times the Church is facing. As lay
Catholics, we are also called to support our priests, diocesan and
religious, in their difficult ministry in whatever way we can. I
have personally seen how hard many priests work for the benefit for
those under their care.
Do not let the SSPX mislead you with their false teachings, no
matter how "Catholic" they may seem. It is not Catholic to disobey
the Pope in matters where he lawfully exercises his authority.