Quit misquoting. I said association with murderers and the sworn enemies of Christ, not doctrines. Besides, the pope doesn't necessarily uphold the doctrines. I believe SSPX does, but the Vatican is suspect and you know that yourself. So keep it straight.
A fair statement would be, SSPX upholds the doctrines of the Catholic church and the popes who have made common cause with the sworn enemies of Christ and murderers of their fellow Catholics. That they also uphold the pope cuts no ice at the bargaining table. Though why the heck Catholics should have to bargain with their own leader is a mystery to me.
I'll take it a bit further. For having upheld the doctrines of the Church, those popes have treated the SSPX as the enemy, while holding dear and near the enemies of Christ and His bride.
Is this not true?