If invited, I'm sure they would have declined.
The SSPX, IMHO, still obeys the First Commandment. Did the infallible VC II absolve you neo-cons from this or any other Commandment? Moving the tabernacle to make room for a statue of buddha, removing crucifix's, ... "Though shall not put false gods before me".
Agreed. Refusal of the Pope is the sine qua non of a schismatic cabal