His Hermeneuticalness has a good post on the anti-Pope reaction after the lifting of the excommunication of SSPX Bishop Williamson, who has made galactically imprudent statements about the killing of Jews in WWII.
Clearly not everyone at the Vatican is happy. No surprise there, then. Pope Benedict has certainly made a risky move. He knew about Bishop Williamson’s utterly reprehensible views (which the official Vatican press spokesman has unambiguously repudiated) but presumably also knew that there was no prospect of eradicating such tendencies within the SSPX before the move to effect reconciliation. He has perhaps judged it better to get the Fraternity on board and take the media flak, hoping that the extremist elements will fall away, not wishing to be associated with a Pope and a "Conciliar Rome" that they have railed against. Meanwhile, the more sensible elements of the SSPX will see that regular jurisdiction is a pressing and urgent need.
Yes… the clock is ticking.
There is already a whole generation of followers of the SSPX who have never known unity with Rome.