I also have a sympathy for them, and I am offering many prayers for the reconciliation.
Anyway things look prospective now, since the 3 bishops have signed the preamble.
I think most of the SSPX priests are heroes, they would rather go the risk of being excommunicated than compromise. It's a tragedy that Archbishop Lefebrve and the 4 bishops were excommunicated in 1988, and all the SSPX priests are suspended until today.
It would be impossible for us to know what really happened at that moment, as Rome and SSPX have different edition of the story.
As far as I could see, it's a hero act to keep the tradition and have the good will to save the church, but I do see there is an unhealthy attitude growing inside SSPX.
So, the church is in crisis while SSPX is in an unhealthy state. SSPX's tragedy is merely part of the tragedy of the church, and no doubt everyone is suffering.
I sincerely hope God would hear our prayers and will allow SSPX to come back to the church soon.
We will humbly pray.